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Methylphenidate

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"Ritalin" redirects here. Not to be confused with Ryetalyn.

Methylphenidate
Clinical data
Pronunciation/ˌmɛθəlˈfɛnɪdeɪt, -ˈfiː-/
Trade namesRitalin, Rubifen,[1] Concerta, others
Other namesMPH[2]
AHFS/Drugs.comMonograph
MedlinePlusa682188
License data
Pregnancy
category
  • AU: D
Dependence
liability		Physical: None
Psychological: Moderate[3]
Addiction
liability		Moderate
Routes of
administration		By mouth, transdermal, insufflation, sublingual, rectal, intravenous [4]
Drug classStimulant; Norepinephrine–dopamine reuptake inhibitor (NDRI)
ATC code
Legal status
Legal status
Pharmacokinetic data
BioavailabilityInsufflation: ~70% Oral: ~30% (range: 11-52%)
Protein binding10–33%
MetabolismLiver (80%) mostly CES1-mediated
Elimination half-life2–3 hours[14]
Duration of action
  • Instant-release: 3–4 hours
  • Extended-release: 6–12 hours
ExcretionUrine (90%)
Identifiers
  • Methyl phenyl(piperidin-2-yl)acetate
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard100.003.662 Edit this at Wikidata
Chemical and physical data
FormulaC14H19NO2
Molar mass233.311 g·mol−1
3D model (JSmol)
Melting point74 °C (165 °F) [15]
Boiling point136 °C (277 °F) [15]
  • COC(=O)C(c1ccccc1)C1CCCCN1
  • InChI=1S/C14H19NO2/c1-17-14(16)13(11-7-3-2-4-8-11)12-9-5-6-10-15-12/h2-4,7-8,12-13,15H,5-6,9-10H2,1H3 checkY
  • Key:DUGOZIWVEXMGBE-UHFFFAOYSA-N checkY
  (verify)

Methylphenidate, sold under the brand names Ritalin (/ˈrɪtəlɪn/ RIT-ə-lin) and Concerta (/kənˈsɜːrtə/ kən-SUR-tə) among others, is a central nervous system (CNS) stimulant used medically to treat attention deficit hyperactivity disorder (ADHD) and, to a lesser extent, narcolepsy. It is a first-line treatment for ADHD (e.g. in the UK[16]); it may be taken by mouth or applied to the skin, and different formulations have varying durations of effect.[4] For ADHD, the effectiveness of methylphenidate is comparable to atomoxetine[17][18][19][20] but modestly lower than amphetamines,[21][22][23][24] alleviating the executive functioning deficits of sustained attention, inhibition, working memory, reaction time[25] and emotional self-regulation.[26][27]

Common adverse reactions of methylphenidate include euphoria, dilated pupils, tachycardia, palpitations, headache, insomnia, anxiety, hyperhidrosis, weight loss, decreased appetite, dry mouth, nausea, and abdominal pain.[10] Withdrawal symptoms may include chills, depression, drowsiness, dysphoria, exhaustion, headache, irritability, lethargy, nightmares, restlessness, suicidal thoughts, and weakness.[4]

Methylphenidate is believed to work by blocking the reuptake of dopamine and norepinephrine by neurons.[28][29] It is a central nervous system (CNS) stimulant of the phenethylamine and piperidine classes. It is available as a generic medication.[30] In 2022, it was the 32nd most commonly prescribed medication in the United States, with more than 17 million prescriptions.[31][32]

Etymology

[edit]

The word methylphenidate is a portmanteau of the chemical name, Methyl-2-phenyl-2-(piperidin-2-yl) acetate.

The name "Ritalin" derives from Marguerite "Rita" Panizzon, the wife of Leandro Panizzon, who first synthesized the drug in 1944. Rita was the first person to take methylphenidate, and described its effects to her husband.[33]

Uses

[edit]

Methylphenidate is most commonly used to treat ADHD and narcolepsy.[34]

Attention deficit hyperactivity disorder

[edit]

Methylphenidate is used for the treatment of attention deficit hyperactivity disorder (ADHD).[35] The dosage may vary and is titrated to effect, with some guidelines recommending initial treatment with a low dose.[36] Methylphenidate is available in both immediate-release and extended-release (XR) formulations to provide a sustained release of the drug.[37][38] Methylphenidate is not approved for children under six years of age.[39][40]

The International Consensus Statement on ADHD shows that the results from systematic reviews, meta-analyses and large scale studies are clear: methylphenidate is safe and efficacious, but also among the most efficacious drugs in all of medicine; treatment in the long-term significantly reduces or eliminates the elevated risks for obesity, accidental injuries, traumatic brain injury, substance abuse, cigarette smoking, educational underachievement, bone fractures, sexually transmitted infections, depression, suicide, criminal activity, teenage pregnancy, vehicle crashes, burn injuries and overall-cause mortality.[41]

One committee from the World Health Organization (WHO) responsible for the World Health Organization Essential Medicines List rejected an application in 2019, and a second application endorsed by 51 professional medical groups in 2021, for methylphenidate's inclusion due to uncertainty about its efficacy and safety.[42][43] However, in November 2023, the WHO Mental Health Gap Action Programme Guidelines for mental, neurological, and substance use disorders makes a clear recommendation that methylphenidate should be considered for children aged 6 years and older who have ADHD, noting specifically that, "methylphenidate treatment shows substantial effects on symptom reduction",[44] in addition to other WHO publications.[45] In 2024, the European Society for Child and Adolescent Psychiatry (ESCAP) and the American Academy of Paediatrics (AAP) endorsed the inclusion of methylphenidate in the WHO EML.[46][47]

Safety and efficacy data have been reviewed extensively by medical regulators (e.g., the US Food and Drug Administration and the European Medicines Agency), the developers of evidence-based national guidelines (e.g., the UK National Institute for Health and Care Excellence and the American Academy of Pediatrics), and government agencies who have endorsed these guidelines (e.g., the Australian National Health and Medical Research Council). These professional groups unanimously conclude, based on the scientific evidence, that methylphenidate is safe and effective and should be considered as a first-line treatment for ADHD.[41]

Since ADHD diagnosis has increased around the world, methylphenidate may be misused as a "study drug" by some populations, which may be harmful.[48] This also applies to people who may be experiencing a different issue and are misdiagnosed with ADHD.[48] People in this category can then experience negative side-effects of the drug, which worsen their condition.[48]

Long-term meta-analyses and systematic reviews show that the medications used to treat ADHD are not associated with observed deficits in brain structure, but with improved brain development and functioning, most prominently in inferior frontal and striatal regions.[41] The most comprehensive meta-analysis available (19 studies with over 3.9 million participants) found "no statistically significant association between ADHD medications [including methylphenidate] and the risk of cardiovascular event among children and adolescents, young and middle-aged adults, or older adults";[49] as do other systematic reviews and meta-analyses.[50][51][52]

Narcolepsy

[edit]

Narcolepsy, a chronic sleep disorder characterized by overwhelming daytime drowsiness and uncontrollable sleep, is treated primarily with stimulants. Methylphenidate is considered effective in increasing wakefulness, vigilance, and performance.[53] Methylphenidate improves measures of somnolence on standardized tests, such as the Multiple Sleep Latency Test (MSLT), but performance does not improve to levels comparable to healthy people.[54]

Other medical uses

[edit]

Methylphenidate may also be prescribed for off-label use in treatment-resistant cases of bipolar disorder and major depressive disorder.[55] It can also improve depression in several groups, including stroke, cancer, and HIV-positive patients.[56] There is weak evidence in favor of methylphenidate's effectiveness for depression,[57] including providing additional benefit in combination with antidepressants.[58] In individuals with terminal cancer, methylphenidate can be used to counteract opioid-induced somnolence, to increase the analgesic effects of opioids, to treat depression, and to improve cognitive function.[59] A 2021 systematic review and meta-analysis found that all studies on geriatric depression reported positive results of methylphenidate use; the review recommended short-term use in combination with citalopram.[60] A 2018 review found low-quality evidence supporting its use to treat apathy as seen in Alzheimer's disease, in addition to slight benefits for cognition and cognitive performance.[61] A 2023 Evidence Update cited methylphenidate used off-label for multiple sclerosis fatigue, though adverse events are also commonly experienced by patients.[62]

Enhancing performance

[edit]

Methylphenidate's efficacy as an athletic performance enhancer, cognitive enhancer, aphrodisiac, and euphoriant is supported by research.[63][64][65][66][67][68][69][70][71] However, the manner in which methylphenidate is used for these purposes (high dosages, alternate routes of administration, during sleep deprivation, etc.) can result in severe unintended side effects.[72][73][71] A 2015 review found that therapeutic doses of amphetamine and methylphenidate result in modest improvements in cognition, including working memory, episodic memory, and inhibitory control, in normal healthy adults;[74][a][75][b] the cognition-enhancing effects of these drugs are known to occur through the indirect activation of both dopamine receptor D1 and adrenoceptor α2 in the prefrontal cortex.[74] Methylphenidate and other ADHD stimulants also improve task saliency and increase arousal.[76][77] Stimulants such as amphetamine and methylphenidate can improve performance on difficult and boring tasks,[76][c][77][78] and are used by some students as a study and test-taking aid.[48][79] Based upon studies of self-reported illicit stimulant use, performance-enhancing use rather than use as a recreational drug, is the primary reason that students use stimulants.[80]

Excessive doses of methylphenidate, above the therapeutic range, can interfere with working memory and cognitive control.[76][77] Like amphetamine and bupropion, methylphenidate increases stamina and endurance in humans primarily through reuptake inhibition of dopamine in the central nervous system.[81] Similar to the loss of cognitive enhancement when using large amounts, large doses of methylphenidate can induce side effects that impair athletic performance, such as rhabdomyolysis and hyperthermia.[13] While literature suggests it might improve cognition, most authors agree that using the drug as a study aid when an ADHD diagnosis is not present does not actually improve GPA.[48] Moreover, it has been suggested that students who use the drug for studying may be self-medicating for potentially deeper underlying issues.[48]

Contraindications

[edit]

Methylphenidate is contraindicated for individuals with agitation, tics, glaucoma, heart defects or a hypersensitivity to any ingredients contained in methylphenidate pharmaceuticals.[13]

Pregnant women are advised to only use the medication if the benefits outweigh the potential risks.[82] Not enough human studies have been conducted to conclusively demonstrate an effect of methylphenidate on fetal development.[83] In 2018, a review concluded that it has not been teratogenic in rats and rabbits, and that it "is not a major human teratogen".[84]

Adverse effects

[edit]
Addiction experts in psychiatry, chemistry, pharmacology, forensic science, epidemiology, and the police and legal services engaged in delphic analysis regarding 20 popular recreational drugs. Methylphenidate was ranked 13th in dependence, 12th in physical harm, and 18th in social harm.[85]

The most common side effects associated with methylphenidate (in standard and extended-release formulations) are appetite loss, dry mouth, anxiety/nervousness, nausea, and insomnia.[86] Gastrointestinal adverse effects may include abdominal pain and weight loss. Nervous system adverse effects may include akathisia (agitation/restlessness), irritability, dyskinesia (tics), lethargy (drowsiness/fatigue), and dizziness. Cardiac adverse effects may include palpitations, changes in blood pressure, and heart rate (typically mild), and tachycardia (rapid heart rate).[87] Ophthalmologic adverse effects may include blurred vision caused by pupil dilatation and dry eyes, with less frequent reports of diplopia and mydriasis.[contradictory][88][89]

Results from a 2024 systematic review showed that methylphenidate significantly improves ADHD symptoms and broadband measures but can cause appetite suppression and other adverse events in children and adolescents.[90] Smokers with ADHD who take methylphenidate may increase their nicotine dependence, and smoke more often than before they began using methylphenidate, with increased nicotine cravings and an average increase of 1.3 cigarettes per day.[91]

There is some evidence of mild reductions in height with prolonged treatment in children.[92] This has been estimated at 1 centimetre (0.4 in) or less per year during the first three years with a total decrease of 3 centimetres (1.2 in) over 10 years.[93][94]

Hypersensitivity (including skin rash, urticaria, and fever) is sometimes reported when using transdermal methylphenidate. The Daytrana patch has a much higher rate of skin reactions than oral methylphenidate.[95]

Methylphenidate can worsen psychosis in people who are psychotic, and in very rare cases it has been associated with the emergence of new psychotic symptoms.[96] It should be used with extreme caution in people with bipolar disorder due to the potential induction of mania or hypomania.[97] There have been very rare reports of suicidal ideation, but some authors claim that evidence does not support a link.[92] Logorrhea is occasionally reported and visual hallucinations are very rarely reported.[88] Priapism is a very rare adverse event that can be potentially serious.[98]

U.S. Food and Drug Administration-commissioned studies in 2011 indicate that in children, young adults, and adults, there is no association between serious adverse cardiovascular events (sudden death, heart attack, and stroke) and the medical use of methylphenidate or other ADHD stimulants.[99]

Because some adverse effects may only emerge during chronic use of methylphenidate, a constant watch for adverse effects is recommended.[100]

A 2018 Cochrane review found that methylphenidate might be associated with serious side effects such as heart problems, psychosis, and death. The certainty of the evidence was stated as very low.[101]

The same review found tentative evidence that it may cause both serious and non-serious adverse effects in children.[101][d]

Overdose

[edit]

The symptoms of a moderate acute overdose on methylphenidate primarily arise from central nervous system overstimulation; these symptoms include: vomiting, nausea, agitation, tremors, hyperreflexia, muscle twitching, euphoria, confusion, hallucinations, delirium, hyperthermia, sweating, flushing, headache, tachycardia, heart palpitations, cardiac arrhythmias, hypertension, mydriasis, and dryness of mucous membranes.[13][102] A severe overdose may involve symptoms such as hyperpyrexia, sympathomimetic toxidrome, convulsions, paranoia, stereotypy (a repetitive movement disorder), rhabdomyolysis, coma, and circulatory collapse.[13][102][103][e] A methylphenidate overdose is rarely fatal with appropriate care.[103] Following injection of methylphenidate tablets into an artery, severe toxic reactions involving abscess formation and necrosis have been reported.[104]

Treatment of a methylphenidate overdose typically involves the administration of benzodiazepines, with antipsychotics, α-adrenoceptor agonists and propofol serving as second-line therapies.[103]

Packaging of a formulation of methylphenidate advises against crushing the tablets. It is placed under Schedule X of the Indian drug scheduling system. Schedule X medications typically hold abusable medications such as barbiturates or stimulants such as amphetamines.

Addiction and dependence

[edit]

Methylphenidate is a stimulant with an addiction liability and dependence liability similar to amphetamine. It has moderate liability among addictive drugs;[105][106] accordingly, addiction and psychological dependence are possible and likely when methylphenidate is used at high doses as a recreational drug.[106] When used above the medical dose range, stimulants are associated with the development of stimulant psychosis.[107]

Biomolecular mechanisms

[edit]
Further information: Addiction § Biomolecular mechanisms

Methylphenidate has the potential to induce euphoria due to its pharmacodynamic effect (i.e., dopamine reuptake inhibition) in the brain's reward system. At therapeutic doses, ADHD stimulants do not sufficiently activate the reward system; consequently, when taken as directed in doses that are commonly prescribed for the treatment of ADHD, methylphenidate use lacks the capacity to cause an addiction.[106]

Interactions

[edit]

Methylphenidate may inhibit the metabolism of vitamin K anticoagulants, certain anticonvulsants, and some antidepressants (tricyclic antidepressants, and selective serotonin reuptake inhibitors). Concomitant administration may require dose adjustments, possibly assisted by monitoring of plasma drug concentrations.[12] There are several case reports of methylphenidate inducing serotonin syndrome with concomitant administration of antidepressants.[108][109][110][111]

When methylphenidate is coingested with ethanol, a metabolite called ethylphenidate is formed via hepatic transesterification,[112][113] not unlike the hepatic formation of cocaethylene from cocaine and ethanol. The reduced potency of ethylphenidate and its minor formation means it does not contribute to the pharmacological profile at therapeutic doses, and even in overdose cases, ethylphenidate concentrations remain negligible.[114][113]

Coingestion of alcohol also increases the blood plasma levels of d-methylphenidate by up to 40%.[115]

Liver toxicity from methylphenidate is extremely rare, but limited evidence suggests that intake of β-adrenergic agonists with methylphenidate may increase the risk of liver toxicity.[116]

Pharmacology

[edit]

Pharmacodynamics

[edit]
Binding profile[117][118][119]
Neurotransmitter
transporter 		Measure
(units) 		dl-MPH d-MPH l-MPH
DAT Ki (nMTooltip nanomolar) 121 161 2250
IC50 (nM) 20 23 1600
NET Ki (nM) 788 206 >10000
IC50 (nM) 51 39 980
SERT Ki (nM) >10000 >10000 >6700
IC50 (nM) — >10000 >10000
GPCR Measure
(units) 		dl-MPH d-MPH l-MPH
5-HT1A Ki (nMTooltip nanomolar) 5000 3400 >10000
IC50 (nM) 10000 6800 >10000
5-HT2B Ki (nM) >10000 4700 >10000
IC50 (nM) >10000 4900 >10000

Methylphenidate acts primarily as a strong norepinephrine–dopamine reuptake inhibitor (NDRI). It is a benzylpiperidine and phenethylamine derivative which also shares part of its basic structure with catecholamines.

Methylphenidate is a psychostimulant and increases the activity of the central nervous system through inhibition on reuptake of the neurotransmitters norepinephrine and dopamine. As models of ADHD suggest, it is associated with functional impairments in some of the brain's neurotransmitter systems, particularly those involving dopamine in the mesocortical and mesolimbic pathways and norepinephrine in the prefrontal cortex and locus coeruleus.[120] Psychostimulants like methylphenidate and amphetamine may be effective in treating ADHD because they increase neurotransmitter activity in these systems. When reuptake of those neurotransmitters is halted, its concentration and effects in the synapse increase and last longer, respectively. Therefore, methylphenidate is called a norepinephrine–dopamine reuptake inhibitor.[114] By increasing the effects of norepinephrine and dopamine, methylphenidate increases the activity of the central nervous system and produces effects such as increased alertness, reduced fatigue, and improved attention.[120][121]

Methylphenidate is most active at modulating levels of dopamine (DA) and to a lesser extent norepinephrine (NE).[122] Methylphenidate binds to and blocks dopamine transporters (DAT) and norepinephrine transporters (NET).[123] Variability exists between DAT blockade, and extracellular dopamine, leading to the hypothesis that methylphenidate amplifies basal dopamine activity, leading to nonresponse in those with low basal DA activity.[124] On average, methylphenidate elicits a 3–4 times increase in dopamine and norepinephrine in the striatum and prefrontal cortex.[2] Magnetic resonance imaging (MRI) studies suggest that long-term treatment with ADHD stimulants (specifically, amphetamine and methylphenidate) decreases abnormalities in brain structure and function found in subjects with ADHD.[125][126][127][f]

Both amphetamine and methylphenidate are predominantly dopaminergic drugs, yet their mechanisms of action are distinct. Methylphenidate acts as a norepinephrine–dopamine reuptake inhibitor, while amphetamine is both a releasing agent and reuptake inhibitor of dopamine and norepinephrine. Methylphenidate's mechanism of action in the release of dopamine and norepinephrine is fundamentally different from most other phenethylamine derivatives, as methylphenidate is thought to increase neuronal firing rate,[128][129][130] whereas amphetamine reduces firing rate, but causes monoamine release by reversing the flow of the monoamines through monoamine transporters via a diverse set of mechanisms, including TAAR1 activation and modulation of VMAT2 function, among other mechanisms.[131][132][g][133][h] The difference in mechanism of action between methylphenidate and amphetamine results in methylphenidate inhibiting amphetamine's effects on monoamine transporters when they are co-administered.[131][better source needed]

Methylphenidate has both dopamine transporter and norepinephrine transporter binding affinity, with the dextromethylphenidate enantiomers displaying a prominent affinity for the norepinephrine transporter.[134] Both the dextrorotary and levorotary enantiomers displayed receptor affinity for the serotonergic 5HT1A and 5HT2B subtypes, though direct binding to the serotonin transporter was not observed.[119] A later study confirmed the d-threo-methylphenidate (dexmethylphenidate) binding to the 5HT1A receptor, but no significant activity on the 5HT2B receptor was found.[135]

There exist some paradoxical findings that oppose the notion that methylphenidate acts as silent antagonist of the DAT (DAT inhibitor).[136] 80% occupancy of the DAT is necessary for methylphenidate's euphoriant effect, but re-administration of methylphenidate beyond this level of DAT occupancy has been found to produce similarly potent euphoriant effects (despite DAT occupancy being unchanged with repeated administration).[136] By contrast, other DAT inhibitors such as bupropion have not been observed to exhibit this effect.[137] These observations have prompted the hypothesis that methylphenidate may act as a "DAT inverse agonist" or "negative allosteric modifier of the DAT" by reversing the direction of the dopamine efflux by the DAT at higher dosages.[138]

Methylphenidate may protect neurons from the neurotoxic effects of Parkinson's disease and methamphetamine use disorder.[139] The hypothesized mechanism of neuroprotection is through inhibition of methamphetamine–DAT interactions, and through reducing cytosolic dopamine, leading to decreased production of dopamine-related reactive oxygen species.[139]

The dextrorotary enantiomers are significantly more potent than the levorotary enantiomers, and some medications therefore only contain dexmethylphenidate.[122] The studied maximized daily dosage of OROS methylphenidate appears to be 144 mg/day.[140]

Pharmacokinetics

[edit]
Further information: § Available forms

Methylphenidate taken by mouth has a bioavailability of 11–52% with a duration of action around 2–4 hours for instant-release (i.e. Ritalin), 3–8 hours for sustained-release (i.e. Ritalin SR), and 8–12 hours for extended-release (i.e. Concerta). The half-life of methylphenidate is 2–3 hours, depending on the individual. The peak plasma time is achieved at about 2 hours.[14] Methylphenidate has a low plasma protein binding of 10–33% and a volume of distribution of 2.65 L/kg.[11]

Dextromethylphenidate is much more bioavailable than levomethylphenidate when administered orally, and is primarily responsible for the psychoactivity of racemic methylphenidate.[14]

The oral bioavailability and speed of absorption for immediate-release methylphenidate is increased when administered with a meal.[141] The effects of a high fat meal on the observed Cmax differ between some extended-release formulations, with combined IR/ER and OROS formulations showing reduced Cmax levels[142] while liquid-based extended-release formulations showed increased Cmax levels when administered with a high-fat meal, according to some researchers.[143] A 2003 study, however, showed no difference between a high-fat meal administration and a fasting administration of oral methylphenidate.[144]

Methylphenidate is metabolized into ritalinic acid by CES1A1 enzymes in the liver. Dextromethylphenidate is selectively metabolized at a slower rate than levomethylphenidate.[145] 97% of the metabolised drug is excreted in the urine, and between 1 and 3% is excreted in the faeces. A small amount, less than 1%, of the drug is excreted in the urine in its unchanged form.[11]

Chemistry

[edit]
See also: List of methylphenidate analogues

Despite the claim made by some urban legends, it is not a cocaine derivative nor analog, however both compounds contain a methyl piperidinylcarboxylate moiety with 2-carbon distance between nitrogen and methanoate, methylphenidate containing methyl (piperidin-2-yl)-ethanoate and cocaine containing methyl (piperidin-3-yl)-methanoate. Cocaine is a local anesthetic and ligand channel blocker with SNDRI action, while methylphenidate is an NDRI with 2–3 fold selectivity for the dopamine transporter (DAT) over the norepinephrine transporter (NET). Cocaine is also more potent in serotonin transporters (SERTs) than NDRI sites.[146][147]

Four isomers of methylphenidate are possible, since the molecule has two chiral centers. One pair of threo isomers and one pair of erythro are distinguished, from which primarily d-threo-methylphenidate exhibits the pharmacologically desired effects.[122][148] The erythro diastereomers are pressor amines, a property not shared with the threo diastereomers. When the drug was first introduced it was sold as a 4:1 mixture of erythro:threo diastereomers, but it was later reformulated to contain only the threo diastereomers. "TMP" refers to a threo product that does not contain any erythro diastereomers, i.e. (±)-threo-methylphenidate. Since the threo isomers are energetically favored, it is easy to epimerize out any of the undesired erythro isomers. The drug that contains only dextrorotatory methylphenidate is sometimes called d-TMP, although this name is only rarely used and it is much more commonly referred to as dexmethylphenidate, d-MPH, or d-threo-methylphenidate. A review on the synthesis of enantiomerically pure (2R,2'R)-(+)-threo-methylphenidate hydrochloride has been published.[149]

Methylphenidate synthesis
Methylphenidate synthesis graphic
Method 1: Methylphenidate preparation elucidated by Axten et al. (1998)[150] via Bamford–Stevens reaction.
Methylphenidate synthesis graphic
Method 2: Classic methylphenidate synthesis[151]

Detection in biological fluids

[edit]

The concentration of methylphenidate or ritalinic acid, its major metabolite, may be quantified in plasma, serum or whole blood in order to monitor compliance in those receiving the drug therapeutically, to confirm the diagnosis in potential poisoning victims or to assist in the forensic investigation in a case of fatal overdosage.[152]

History

[edit]

Methylphenidate was first synthesized in 1944 and was approved for medical use in the United States in 1955.[153][154][155] It was synthesized by chemist Leandro Panizzon and sold by Swiss company CIBA (now Novartis).[153] He named the drug after his wife Margarita, nicknamed Rita, who used Ritalin to compensate for low blood pressure.[156] Methylphenidate was not reported to be a stimulant until 1954.[157][158] The drug was introduced for medical use in the United States in 1957.[159] Originally, it was marketed as a mixture of two racemates, 80% (±)-erythro and 20% (±)-threo, under the brand name Centedrin.[157] Subsequent studies of the racemates showed that the central stimulant activity is associated with the threo racemate and were focused on the separation and interconversion of the erythro isomer into the more active threo isomer.[157][160][161][162] The erythro isomer was eliminated, and now modern formulations of methyphenidate contain only the threo isomer in a 50:50 mixture of d- and l-isomers.[157]

Methylphenidate was first used to allay barbiturate-induced coma, narcolepsy and depression.[163] It was later used to treat memory deficits in the elderly.[164] Beginning in the 1960s, it was used to treat children with ADHD based on earlier work, starting with the studies by American psychiatrist Charles Bradley[165] on the use of psychostimulant drugs, such as Benzedrine, with then called "maladjusted children".[166] Production and prescription of methylphenidate rose significantly in the 1990s, especially in the United States, as the ADHD diagnosis came to be better understood and more generally accepted within the medical and mental health communities.[167]

In 2000, Alza Corporation received US FDA approval to market Concerta, an extended-release form of methylphenidate.[12][168][169]

It was estimated that the number of doses of methylphenidate used globally in 2013 increased by 66% compared to 2012.[170] In 2022, it was the 32nd most commonly prescribed medication in the United States, with more than 17 million prescriptions.[32] It is available as a generic medication.[4]

Society and culture

[edit]

Names

[edit]
  • Swiss "Ritalin" brand methylphenidate
    Swiss "Ritalin" brand methylphenidate
  • Indian "AddWize" branded instant-release and extended-release formulations costing US$1.9 for a strip of instant-release and US$2.9 for a strip of AddWize extended-release
    Indian "AddWize" branded instant-release and extended-release formulations costing US$1.9 for a strip of instant-release and US$2.9 for a strip of AddWize extended-release
  • Clockwise from top: Concerta 18 mg, Medikinet 5 mg, Methylphenidat TAD 10 mg, Ritalin 10 mg, Medikinet XL 40 mg
    Clockwise from top: Concerta 18 mg, Medikinet 5 mg, Methylphenidat TAD 10 mg, Ritalin 10 mg, Medikinet XL 40 mg

Methylphenidate is sold in the majority of countries worldwide.[171]: 8–9  Brand names for methylphenidate include Ritalin (in honor of Rita, the wife of the molecule discoverer), Rilatine (in Belgium to avoid a conflict of commercial name with the RIT pharmaceutical company), Concerta,[12] Medikinet, Adaphen, Addwize, Inspiral, Methmild, Artige, Attenta, Cognil, Konsenidat, Equasym, Foquest,[172] Methylin, Penid, Phenida, Prohiper, and Tradea.[171]: 8–9 

Available forms

[edit]

The dextrorotary enantiomer of methylphenidate, known as dexmethylphenidate, is sold as a generic and under the brand names Focalin and Attenade in both an immediate-release and an extended-release form. There is some evidence that dexmethylphenidate has better bioavailability and a longer duration of action than methylphenidate.[134]

Immediate-release

[edit]
  • Structural formula for the substance among Ritalin tablet series. (Ritalin, Ritalin LA, Ritalin SR.) The volume of distribution was 2.65±1.11 L/kg for d-methylphenidate and 1.80±0.91 L/kg for l-methylphenidate subsequent to swallow of Ritalin tablet.[10]
    Structural formula for the substance among Ritalin tablet series. (Ritalin, Ritalin LA, Ritalin SR.) The volume of distribution was 2.65±1.11 L/kg for d-methylphenidate and 1.80±0.91 L/kg for l-methylphenidate subsequent to swallow of Ritalin tablet.[10]
  • Structural formula for the substance inside Concerta tablet. Following administration of Concerta, plasma concentrations of the l-isomer were approximately ⁠1/40⁠ the plasma concentrations of the d-isomer.[12] Note that the substance is the same as for Concerta - the differences lies in other aspects of the individual pills.
    Structural formula for the substance inside Concerta tablet. Following administration of Concerta, plasma concentrations of the l-isomer were approximately ⁠1/40⁠ the plasma concentrations of the d-isomer.[12] Note that the substance is the same as for Concerta - the differences lies in other aspects of the individual pills.

Methylphenidate was originally available as an immediate-release racemic mixture formulation under the Novartis brand name Ritalin, although a variety of generics are available, some under other brand names. Generic brand names include Ritalina, Rilatine, Attenta, Medikinet, Metadate, Methylin, Penid, Tranquilyn, and Rubifen.[citation needed]

Extended-release

[edit]

Extended-release methylphenidate products include:

Brand name(s) Generic name(s)[173][174][175][176] Duration Dosage
form
Aptensio XR (US);
Biphentin (CA) 		Currently unavailable 12 hours[177][178] XR
capsule
Concerta (US/CA/AU);
Concerta XL (UK) 		methylphenidate ER (US/CA);[i]
methylphenidate ER‑C (CA)[ii] 		12 hours[179] OROS
tablet
Quillivant XR (US) Currently unavailable 12 hours[179] oral
suspension
Daytrana (US) methylphenidate film, extended release;transdermal (US)[iii] 11 hours[180] transdermal
patch
Metadate CD (US);
Equasym XL (UK) 		methylphenidate ER (US)[iv] 8–10 hours[179] CD/XL
capsule
QuilliChew ER (US) Currently unavailable 8 hours[181] chewable
tablet
Jornay PM (US) Currently unavailable 6 hours (following 10 hour delay)[182] DR/ER
capsule
Ritalin LA (US/AU);
Medikinet XL (UK) 		methylphenidate ER (US)[v] 8 hours[179] ER
capsule
Ritalin SR (US/CA/UK);
Rubifen SR (NZ) 		Metadate ER (US);[vi]
Methylin ER (US);[vii]
methylphenidate SR (US/CA)[viii] 		5–8 hours[179] CR
tablet
  1. ^ US generic manufactured by Actavis; CA generics manufactured by Pharmascience and Apotex.
  2. ^ Manufactured by Teva.
  3. ^ Manufactured by Mylan Tech Viatris
  4. ^ Manufactured by Impax, Mallinckrodt, and Teva.
  5. ^ Manufactured by Barr and Mayne.
  6. ^ Manufactured by UCB.
  7. ^ Manufactured by Mallinckrodt.
  8. ^ US generics manufactured by County Line Pharmaceuticals and Abhai; CA generic manufactured by Apotex.

Concerta tablets are marked with the letters "ALZA" and followed by: "18", "27", "36", or "54", relating to the dosage strength in milligrams. Approximately 22% of the dose is immediate-release,[183] and the remaining 78% of the dose is released over 10–12 hours post-ingestion, with an initial increase over the first 6–7 hours, and subsequent decline in the released drug.[184]

Ritalin LA capsules are marked with the letters "NVR" (abbrev.: Novartis) and followed by: "R20", "R30", or "R40", depending on the (mg) dosage strength. Ritalin LA[87] provides two standard doses – half the total dose being released immediately and the other half released four hours later. In total, each capsule is effective for about eight hours.

Metadate CD capsules contain two types of beads: 30% are immediate-release, and the other 70% are evenly sustained release.[185]

Medikinet Retard/CR/Adult/Modified Release tablets are an extended-release oral capsule form of methylphenidate. It delivers 50% of the dosage as IR MPH and the remaining 50% in 3–4 hours.[186][187]

Jornay PM is a delayed release formulation that is taken at bedtime. An outer polymer coating delays the initial release of the drug until 8 hours after administration, after which an inner coating regulates the rate of drug absorption. Peak plasma concentration occurs 14 hours following administration.[182] This formulation was motivated by the need for a pediatric ADHD medication that is active immediately after morning waking, as most long-acting formulations exhibit a delay between administration and absorption that leads to inadequate therapeutic effect in the early morning.[188]

Skin patch

[edit]

A methylphenidate skin patch is sold under the brand name Daytrana in the United States. It was developed and marketed by Noven Pharmaceuticals and approved in the US in 2006.[13] It is also referred to as methylphenidate transdermal system (MTS). It is approved as a once-daily treatment in children with ADHD aged 6–17 years. It is mainly prescribed as a second-line treatment when oral forms are not well tolerated, or if people have difficulty with compliance. Noven's original FDA submission indicated that it should be used for 12 hours. When the FDA rejected the submission, they requested evidence that a shorter time period was safe and effective; Noven provided such evidence, and it was approved for a 9-hour period.[189]

Orally administered methylphenidate is subject to first-pass metabolism, by which the levo-isomer is extensively metabolized. By circumventing this first-pass metabolism, the relative concentrations of ℓ-threo-methylphenidate are much higher with transdermal administration (50–60% of those of dexmethylphenidate instead of about 14–27%).[190]

A 39 nanograms/mL peak serum concentration of methylphenidate has been found to occur between 7.5–10.5 hours after administration.[13] However, the onset to peak effect is 2 hours, and the clinical effects remain up to 2 hours after the patch has been removed. The absorption is increased when the transdermal patch is applied onto inflamed skin or skin that has been exposed to heat. The absorption lasts for approximately 9 hours after application (onto normal, unexposed to heat and uninflamed skin). 90% of the medication is excreted in the urine as metabolites and unchanged drug.[13]

Parenteral formulation

[edit]

When it was released in the United States, methylphenidate was available from CIBA in a parenteral form for use by medical professionals. It came in 10mL multiple-dose vials containing 100 mg methylphenidate HCl and 100 mg lactose in lyophilized (freeze-dried) form. It was also available as single-dose ampoules containing 20 mg methylphenidate HCl. Instructions were to reconstitute with 10mL sterile solvent (water). The indication was 10 to 20 mg (1.0mL from MDV's, up to one full single-use ampoule) to produce a focused, talkative state that could help certain patients breakdown the resistance to therapy. Parenteral methylphenidate was discontinued out of a concern for the actual benefit and of inducing a psychic dependence. This is not truth serum in the normal sense, as it does not impair the ability to control the flow of information like a barbiturate agent (Pentothal) or similar might.[citation needed]

Cost

[edit]
Ritalin 10 mg tablet

Brand-name and generic formulations are available.[4]

[edit]
Legal warning printed on Ritalin packaging

Internationally, methylphenidate is a Schedule II drug under the Convention on Psychotropic Substances.[191]

  Legal
  Controlled Substance
  Illegal
Country/Territory Status Notes
 Australia "Schedule 8" controlled substance. Such drugs must be kept in a lockable safe until dispensed and possession without prescription is punishable by fines and imprisonment. [192]
 Canada Schedule III of the Controlled Drugs and Substances Act and is illegal to possess without a prescription, with unlawful possession punishable by up to three years imprisonment, or (via summary conviction) by up to one year imprisonment and/or fines of up to two thousand dollars. Unlawful possession for the purpose of trafficking is punishable by up to ten years imprisonment, or (via summary conviction) by up to eighteen months imprisonment. [193]
 Fiji Schedule 1 Illicit Drug under the Illicit Drugs Control Act 2004 [194]
 France Covered by the "narcotics" schedule, prescription and distribution conditions are restricted, with hospital or city specialist-only (pediatrician for children, psychiatrist or neurologist for adults) prescription for the initial treatment and yearly consultations.[195]
 Hong Kong Controlled under the schedule 1 of the Dangerous Drugs Ordinance (cap. 134). [196]
 India Methylphenidate is a schedule X drug and is controlled by the Drugs and Cosmetics Rules, 1945. It is dispensed only by physician's prescription. Legally, 2 grams of methylphenidate is classified as a small quantity, and 50 grams as a large or commercial quantity. [197][198]
 New Zealand In New Zealand, methylphenidate is a "class B2 controlled substance". Unlawful possession is punishable by six-month prison sentence and distribution by a 14-year sentence.
 Russia List I controlled psychotropic substance without recognized medical value. The Constant Committee for Drug Control of the Russian Ministry of Health has put methylphenidate and its derivatives on the National List of Narcotics, Psychotropic Substances and Their Precursors, and the Government banned methylphenidate for any use on 25 October 2014. [199]
 Sweden List II controlled substance with recognized medical value. Possession without a prescription is punishable by up to three years in prison. [200]
 United Kingdom Controlled "Class B" substance. Possession without prescription carries a sentence up to 5 years or an unlimited fine, or both; supplying methylphenidate is 14 years or an unlimited fine, or both. [201]
 United States Classified as a Schedule II controlled substance, the designation used for substances that have a recognized medical value but present a high potential for misuse. [202]

Controversy

[edit]
Further information: Attention deficit hyperactivity disorder controversies § Stimulants

Methylphenidate has been the subject of controversy in relation to its use in the treatment of ADHD. The prescription of psychostimulant medication to children to reduce ADHD symptoms has been a major point of criticism.[203][need quotation to verify] The contention that methylphenidate acts as a gateway drug has been discredited by multiple sources,[204] according to which abuse is statistically very low and "stimulant therapy in childhood does not increase the risk for subsequent drug and alcohol abuse disorders later in life".[205] A study found that ADHD medication was not associated with an increased risk of cigarette use, and in fact, stimulant treatments such as Ritalin seemed to lower this risk.[206] People treated with stimulants such as methylphenidate during childhood were less likely to have substance use disorders in adulthood.[207]

Among countries with the highest rates of use of methylphenidate medication is Iceland,[208] where research shows that the drug was the most commonly used substance among people who inject drugs.[209] The study involved 108 people who inject drugs and 88% of them had injected methylphenidate within the last 30 days and for 63% of them, methylphenidate was the most preferred substance.

Treatment of ADHD by way of methylphenidate has led to legal actions, including malpractice suits regarding informed consent, inadequate information on side effects, misdiagnosis, and coercive use of medications by school systems.[210]

Research

[edit]

Apathy

[edit]

Methylphenidate may be effective as a treatment for apathy in Alzheimer's disease and other conditions.[211][212][213][214] It may also be useful in the treatment of more severe disorders of diminished motivation, like abulia and akinetic mutism.[214][215]

Addiction

[edit]

Methylphenidate has shown some benefits as a replacement therapy for individuals who are addicted to and dependent upon methamphetamine.[216] Methylphenidate and amphetamine have been investigated as a chemical replacement for the treatment of cocaine addiction.[217][218] Its effectiveness in treatment of cocaine or psychostimulant addiction or psychological dependence has not been proven.[219]

Social anxiety

[edit]

Methylphenidate has been reported to be effective in the treatment of social anxiety disorder in people who are comorbid for both this condition and attention deficit hyperactivity disorder (ADHD) in small preliminary clinical studies and case reports.[220][221][222][223][224][225]

Footnotes

[edit]
  1. ^ The procognitive actions of psychostimulants are only associated with low doses ... cognition-enhancing effects of psychostimulants involve the preferential elevation of catecholamines in the PFC and the subsequent activation of norepinephrine α2 and dopamine D1 receptors. ... This differential modulation of PFC-dependent processes across dose appears to be associated with the differential involvement of noradrenergic α2 versus α1 receptors.[74]
  2. ^ The results of this meta-analysis ... do confirm the reality of cognitive enhancing effects for normal healthy adults in general, while also indicating that these effects are modest in size.[75]
  3. ^ Therapeutic (relatively low) doses of psychostimulants, such as methylphenidate and amphetamine, improve performance on working memory tasks both in normal subjects and those with ADHD ... [It] is now believed that dopamine and norepinephrine, but not serotonin, produce the beneficial effects of stimulants on working memory. At abused (relatively high) doses, stimulants can interfere with working memory and cognitive control ... stimulants act not only on working memory function, but also on general levels of arousal and, within the nucleus accumbens, improve the saliency of tasks. Thus, stimulants improve performance on effortful but tedious tasks ... through indirect stimulation of dopamine and norepinephrine receptors.[76]
  4. ^ "Our findings suggest that methylphenidate may be associated with a number of serious adverse events as well as a large number of non-serious adverse events in children" "Concerning adverse events associated with the treatment, our systematic review of randomised clinical trials (RCTs) demonstrated no increase in serious adverse events, but a high proportion of participants suffered a range of non-serious adverse events."[101]
  5. ^ The management of amphetamine, dextroamphetamine, and methylphenidate overdose is largely supportive, with a focus on interruption of the sympathomimetic syndrome with judicious use of benzodiazepines. In cases where agitation, delirium, and movement disorders are unresponsive to benzodiazepines, second-line therapies include antipsychotics such as ziprasidone or haloperidol, central alpha-adrenoreceptor agonists such as dexmedetomidine, or propofol. ... However, fatalities are rare with appropriate care.[103]
  6. ^ Basal ganglia regions like the right globus pallidus, the right putamen, and the nucleus caudatus are structurally affected in children with ADHD. These changes and alterations in limbic regions like ACC and amygdala are more pronounced in non-treated populations and seem to diminish over time from child to adulthood. Treatment seems to have positive effects on brain structure.[127]
  7. ^ VMAT2 is the CNS vesicular transporter for not only the biogenic amines DA, NE, EPI, 5-HT, and HIS, but likely also for the trace amines TYR, PEA, and thyronamine (THYR) ... AMPH release of DA from synapses requires both an action at VMAT2 to release DA to the cytoplasm and a concerted release of DA from the cytoplasm via "reverse transport" through DAT.[132]
  8. ^ Despite the challenges in determining synaptic vesicle pH, the proton gradient across the vesicle membrane is of fundamental importance for its function. Exposure of isolated catecholamine vesicles to protonophores collapses the pH gradient and rapidly redistributes transmitter from inside to outside the vesicle. ... Amphetamine and its derivatives like methamphetamine are weak base compounds that are the only widely used class of drugs known to elicit transmitter release by a non-exocytic mechanism. As substrates for both DAT and VMAT, amphetamines can be taken up to the cytosol and then sequestered in vesicles, where they act to collapse the vesicular pH gradient.[133]

References

[edit]
  1. ^ Concerta, "Consumer Medicine Information". New Zealand Medicines and Medical Devices Safety Authority. Retrieved 17 September 2024. {{cite web}}: Check |url= value (help)
  2. ^ a b Hodgkins P, Shaw M, Coghill D, Hechtman L (September 2012). "Amfetamine and methylphenidate medications for attention-deficit/hyperactivity disorder: complementary treatment options". European Child & Adolescent Psychiatry. 21 (9): 477–492. doi:10.1007/s00787-012-0286-5. PMC 3432777. PMID 22763750.
  3. ^ Stahl SM (April 2024). "Methylphenidate (D,L)". Prescriber's Guide: Stahl's Essential Psychopharmacology (8th ed.). Cambridge, United Kingdom: Cambridge University Press. pp. 503–510. ISBN 9781108228749.
  4. ^ a b c d e "Methylphenidate Hydrochloride Monograph for Professionals". Drugs.com. AHFS. Archived from the original on 19 December 2018. Retrieved 19 December 2018.
  5. ^ "FDA-sourced list of all drugs with black box warnings (Use Download Full Results and View Query links.)". nctr-crs.fda.gov. FDA. Retrieved 22 October 2023.
  6. ^ Anvisa (31 March 2023). "RDC Nº 784 - Listas de Substâncias Entorpecentes, Psicotrópicas, Precursoras e Outras sob Controle Especial" [Collegiate Board Resolution No. 784 - Lists of Narcotic, Psychotropic, Precursor, and Other Substances under Special Control] (in Brazilian Portuguese). Diário Oficial da União (published 4 April 2023). Archived from the original on 3 August 2023. Retrieved 3 August 2023.
  7. ^ "Ritalin Product information". Health Canada. 25 April 2012. Archived from the original on 11 June 2022. Retrieved 11 June 2022.
  8. ^ "Controlled Drugs and Substances Act". Justice Laws Website. 31 March 2022. Archived from the original on 21 August 2021. Retrieved 11 June 2022.
  9. ^ "Mental health". Health Canada. 9 May 2018. Retrieved 13 April 2024.
  10. ^ a b c "Ritalin- methylphenidate hydrochloride tablet". DailyMed. 26 June 2021. Archived from the original on 20 March 2017. Retrieved 26 March 2022.
  11. ^ a b c "Ritalin LA- methylphenidate hydrochloride capsule, extended release". DailyMed. 26 June 2021. Archived from the original on 26 March 2017. Retrieved 26 March 2022.
  12. ^ a b c d e "Concerta- methylphenidate hydrochloride tablet, extended release". DailyMed. 1 July 2021. Archived from the original on 26 March 2017. Retrieved 26 March 2022.
  13. ^ a b c d e f g h "Daytrana- methylphenidate patch". DailyMed. 15 June 2021. Archived from the original on 19 March 2022. Retrieved 26 March 2022.
  14. ^ a b c Kimko HC, Cross JT, Abernethy DR (December 1999). "Pharmacokinetics and clinical effectiveness of methylphenidate". Clinical Pharmacokinetics. 37 (6): 457–470. doi:10.2165/00003088-199937060-00002. PMID 10628897. S2CID 397390.
  15. ^ a b "Methylphenidate". Pubchem. Archived from the original on 6 January 2014. Retrieved 4 September 2017.
  16. ^ "Attention deficit hyperactivity disorder (ADHD): Treatment". National Health Service (NHS). 24 December 2021. Retrieved 18 October 2022.
  17. ^ Bushe C, Day K, Reed V, Karlsdotter K, Berggren L, Pitcher A, et al. (May 2016). "A network meta-analysis of atomoxetine and osmotic release oral system methylphenidate in the treatment of attention-deficit/hyperactivity disorder in adult patients". Journal of Psychopharmacology. 30 (5): 444–458. doi:10.1177/0269881116636105. PMID 27005307. S2CID 104938.
  18. ^ Hazell PL, Kohn MR, Dickson R, Walton RJ, Granger RE, Wyk GW (November 2011). "Core ADHD symptom improvement with atomoxetine versus methylphenidate: a direct comparison meta-analysis". Journal of Attention Disorders. 15 (8): 674–683. doi:10.1177/1087054710379737. PMID 20837981. S2CID 43503227.
  19. ^ Hanwella R, Senanayake M, de Silva V (November 2011). "Comparative efficacy and acceptability of methylphenidate and atomoxetine in treatment of attention deficit hyperactivity disorder in children and adolescents: a meta-analysis". BMC Psychiatry. 11 (1): 176. doi:10.1186/1471-244X-11-176. PMC 3229459. PMID 22074258.
  20. ^ Rezaei G, Hosseini SA, Akbari Sari A, Olyaeemanesh A, Lotfi MH, Yassini M, et al. (10 February 2016). "Comparative efficacy of methylphenidate and atomoxetine in the treatment of attention deficit hyperactivity disorder in children and adolescents: A systematic review and meta-analysis". Medical Journal of the Islamic Republic of Iran. 30: 325. PMC 4898838. PMID 27390695.
  21. ^ Stuhec M, Lukić P, Locatelli I (February 2019). "Efficacy, Acceptability, and Tolerability of Lisdexamfetamine, Mixed Amphetamine Salts, Methylphenidate, and Modafinil in the Treatment of Attention-Deficit Hyperactivity Disorder in Adults: A Systematic Review and Meta-analysis". The Annals of Pharmacotherapy. 53 (2): 121–133. doi:10.1177/1060028018795703. PMID 30117329. S2CID 52019992.
  22. ^ Faraone SV, Pliszka SR, Olvera RL, Skolnik R, Biederman J (June 2001). "Efficacy of Adderall and methylphenidate in attention deficit hyperactivity disorder: a reanalysis using drug-placebo and drug-drug response curve methodology". Journal of Child and Adolescent Psychopharmacology. 11 (2): 171–180. doi:10.1089/104454601750284081. PMID 11436957. ProQuest 204600452.
  23. ^ Faraone SV, Biederman J, Roe C (October 2002). "Comparative efficacy of Adderall and methylphenidate in attention-deficit/hyperactivity disorder: a meta-analysis". Journal of Clinical Psychopharmacology. 22 (5): 468–473. doi:10.1097/00004714-200210000-00005. PMID 12352269. S2CID 19726926.
  24. ^ Faraone SV, Buitelaar J (April 2010). "Comparing the efficacy of stimulants for ADHD in children and adolescents using meta-analysis". European Child & Adolescent Psychiatry. 19 (4): 353–364. doi:10.1007/s00787-009-0054-3. PMID 19763664. S2CID 9447892.
  25. ^ Isfandnia F, El Masri S, Radua J, Rubia K (July 2024). "The effects of chronic administration of stimulant and non-stimulant medications on executive functions in ADHD: A systematic review and meta-analysis". Neuroscience and Biobehavioral Reviews. 162: 105703. doi:10.1016/j.neubiorev.2024.105703. PMID 38718988.
  26. ^ Faraone SV, Banaschewski T, Coghill D, Zheng Y, Biederman J, Bellgrove MA, et al. (September 2021). "The World Federation of ADHD International Consensus Statement: 208 Evidence-based conclusions about the disorder". Neuroscience and Biobehavioral Reviews. 128: 789–818. doi:10.1016/j.neubiorev.2021.01.022. PMC 8328933. PMID 33549739.
  27. ^ Kamradt JM, Ullsperger JM, Nikolas MA (2014). "Executive function assessment and adult attention-deficit/Hyperactivity disorder: Tasks versus ratings on the Barkley Deficits in Executive Functioning Scale". Psychological Assessment. 26 (4): 1095–1105. doi:10.1037/pas0000006. PMID 24885846.
  28. ^ Arnsten AF, Li BM (June 2005). "Neurobiology of executive functions: catecholamine influences on prefrontal cortical functions". Biological Psychiatry. 57 (11): 1377–1384. doi:10.1016/j.biopsych.2004.08.019. PMID 15950011. S2CID 22992765.
  29. ^ Stahl SM (11 April 2013). Stahl's Essential Psychopharmacology: Neuroscientific basis and practical applications (4th ed.). Cambridge University Press. ISBN 978-1-107-68646-5.
  30. ^ "Methylphenidate Monograph for Professionals". Drugs.com. American Society of Health-System Pharmacists. Archived from the original on 3 February 2019. Retrieved 2 February 2019.
  31. ^ "The Top 300 of 2022". ClinCalc. Archived from the original on 30 August 2024. Retrieved 30 August 2024.
  32. ^ a b "Methylphenidate Drug Usage Statistics, United States, 2013 - 2022". ClinCalc. Retrieved 30 August 2024.
  33. ^ Tappy B. "Every molecule tells a story: Ritalin - Chronique - Corpore Sano - InVivo". www.invivomagazine.com. Retrieved 12 March 2024.
  34. ^ "Methylphenidate". DrugBank. Archived from the original on 31 January 2019. Retrieved 30 January 2019.
  35. ^ Fone KC, Nutt DJ (February 2005). "Stimulants: use and abuse in the treatment of attention deficit hyperactivity disorder". Current Opinion in Pharmacology. 5 (1): 87–93. doi:10.1016/j.coph.2004.10.001. PMID 15661631.
  36. ^ Huss M, Duhan P, Gandhi P, Chen CW, Spannhuth C, Kumar V (2 June 2021). "Methylphenidate dose optimization for ADHD treatment: review of safety, efficacy, and clinical necessity". Neuropsychiatric Disease and Treatment. 13: 1741–1751. doi:10.2147/NDT.S130444. PMC 5505611. PMID 28740389.
  37. ^ Wolraich M, Brown L, Brown RT, DuPaul G, Earls M, Feldman HM, et al. (November 2011). "ADHD: clinical practice guideline for the diagnosis, evaluation, and treatment of attention-deficit / hyperactivity disorder in children and adolescents". Pediatrics. 128 (5): 1007–1022. doi:10.1542/peds.2011-2654. PMC 4500647. PMID 22003063.
  38. ^ Neinstein L (2009). Handbook of Adolescent Health Care. Philadelphia, PA: Wolters Kluwer Health / Lippincott Williams & Wilkins. ISBN 978-0-7817-9020-8. OCLC 226304727.: 722 
  39. ^ Vitiello B (October 2001). "Psychopharmacology for young children: clinical needs and research opportunities". Pediatrics. 108 (4): 983–989. doi:10.1542/peds.108.4.983. PMID 11581454. S2CID 33417584.
  40. ^ Hermens DF, Rowe DL, Gordon E, Williams LM (May 2006). "Integrative neuroscience approach to predict ADHD stimulant response". Expert Review of Neurotherapeutics. 6 (5): 753–763. doi:10.1586/14737175.6.5.753. PMID 16734523. S2CID 15971025.
  41. ^ a b c Faraone SV, Banaschewski T, Coghill D, Zheng Y, Biederman J, Bellgrove MA, et al. (September 2021). "The World Federation of ADHD International Consensus Statement: 208 Evidence-based conclusions about the disorder". Neuroscience and Biobehavioral Reviews. 128: 789–818. doi:10.1016/j.neubiorev.2021.01.022. PMC 8328933. PMID 33549739.
  42. ^ "eEML - Electronic Essential Medicines List". list.essentialmeds.org. Archived from the original on 26 March 2020. Retrieved 26 March 2020.
  43. ^ "A.21 Methylphenidate – attention-deficit hyperactivity disorder – EML and EMLc". www.who.int. Retrieved 1 May 2024.
  44. ^ "Mental Health Gap Action Programme (mhGAP) guideline for mental, neurological and substance use disorders". www.who.int. Retrieved 1 May 2024.
  45. ^ https://applications.emro.who.int/docs/EMRPUB_leaflet_2019_mnh_214_en.pdf [bare URL PDF]
  46. ^ Cortese S, Coghill D, Fegert JM, Mattingly GW, Rohde LA, Wong IC, et al. (May 2024). "ESCAP endorses the inclusion of methylphenidate in the WHO model lists of essential medicines and in the Union list of critical medicines". European Child & Adolescent Psychiatry. 33 (5): 1605–1608. doi:10.1007/s00787-024-02443-5. PMID 38662057.
  47. ^ Cortese S, Coghill D, Mattingly GW, Rohde LA, Thom RP, Wilens TE, et al. (July 2024). "AACAP Endorses the Inclusion of Methylphenidate in the WHO Model Lists of Essential Medicines". Journal of the American Academy of Child and Adolescent Psychiatry. 63 (7): 663–665. doi:10.1016/j.jaac.2024.02.008. PMID 38428579.
  48. ^ a b c d e f Abelman DD (October 2017). "Mitigating risks of students use of study drugs through understanding motivations for use and applying harm reduction theory: a literature review". Harm Reduction Journal. 14 (1): 68. doi:10.1186/s12954-017-0194-6. PMC 5639593. PMID 28985738.
  49. ^ Zhang L, Yao H, Li L, Du Rietz E, Andell P, Garcia-Argibay M, et al. (November 2022). "Risk of Cardiovascular Diseases Associated With Medications Used in Attention-Deficit/Hyperactivity Disorder: A Systematic Review and Meta-analysis". JAMA Network Open. 5 (11): e2243597. doi:10.1001/jamanetworkopen.2022.43597. PMC 9685490. PMID 36416824.
  50. ^ Liang EF, Lim SZ, Tam WW, Ho CS, Zhang MW, McIntyre RS, et al. (August 2018). "The Effect of Methylphenidate and Atomoxetine on Heart Rate and Systolic Blood Pressure in Young People and Adults with Attention-Deficit Hyperactivity Disorder (ADHD): Systematic Review, Meta-Analysis, and Meta-Regression". International Journal of Environmental Research and Public Health. 15 (8): 1789. doi:10.3390/ijerph15081789. PMC 6121294. PMID 30127314.
  51. ^ Liu H, Feng W, Zhang D (October 2019). "Association of ADHD medications with the risk of cardiovascular diseases: a meta-analysis". European Child & Adolescent Psychiatry. 28 (10): 1283–1293. doi:10.1007/s00787-018-1217-x. PMID 30143889.
  52. ^ Habel LA, Cooper WO, Sox CM, Chan KA, Fireman BH, Arbogast PG, et al. (December 2011). "ADHD medications and risk of serious cardiovascular events in young and middle-aged adults". JAMA. 306 (24): 2673–2683. doi:10.1001/jama.2011.1830. PMC 3350308. PMID 22161946.
  53. ^ Fry JM (February 1998). "Treatment modalities for narcolepsy". Neurology. 50 (2 Suppl 1): S43–S48. doi:10.1212/WNL.50.2_Suppl_1.S43. PMID 9484423. S2CID 36824088.
  54. ^ Mitler MM (December 1994). "Evaluation of treatment with stimulants in narcolepsy". Sleep. 17 (8 Suppl): S103–S106. doi:10.1093/sleep/17.suppl_8.S103. PMID 7701190.
  55. ^ Dell'Osso B, Dobrea C, Cremaschi L, Arici C, Altamura AC (December 2014). "Wake-promoting pharmacotherapy for psychiatric disorders". Current Psychiatry Reports. 16 (12): 524. doi:10.1007/s11920-014-0524-2. PMID 25312027. S2CID 26314915.
  56. ^ Leonard BE, McCartan D, White J, King DJ (April 2004). "Methylphenidate: A review of its neuropharmacological, neuropsychological, and adverse clinical effects". Human Psychopharmacology. 19 (3): 151–180. doi:10.1002/hup.579. PMID 15079851. S2CID 21173346.
  57. ^ Bahji A, Mesbah-Oskui L (September 2021). "Comparative efficacy and safety of stimulant-type medications for depression: A systematic review and network meta-analysis". Journal of Affective Disorders. 292: 416–423. doi:10.1016/j.jad.2021.05.119. PMID 34144366.
  58. ^ Pary R, Scarff JR, Jijakli A, Tobias C, Lippmann S (April 2015). "A Review of Psychostimulants for Adults With Depression". Federal Practitioner. 32 (Suppl 3): 30S–37S. PMC 6375494. PMID 30766117.
  59. ^ Rozans M, Dreisbach A, Lertora JJ, Kahn MJ (January 2002). "Palliative uses of methylphenidate in patients with cancer: a review". Journal of Clinical Oncology. 20 (1): 335–339. doi:10.1200/JCO.20.1.335. PMID 11773187.
  60. ^ Smith KR, Kahlon CH, Brown JN, Britt RB (September 2021). "Methylphenidate use in geriatric depression: A systematic review". International Journal of Geriatric Psychiatry. 36 (9): 1304–1312. doi:10.1002/gps.5536. PMID 33829530. S2CID 233184870.
  61. ^ Ruthirakuhan MT, Herrmann N, Abraham EH, Chan S, Lanctôt KL (May 2018). "Pharmacological interventions for apathy in Alzheimer's disease". The Cochrane Database of Systematic Reviews. 5 (6): CD012197. doi:10.1002/14651858.CD012197.pub2. PMC 6494556. PMID 29727467.
  62. ^ "Comparing Treatments for Multiple Sclerosis-Related Fatigue - Evidence Update for Clinicians". Patient-Centered Outcomes Research Institute. 1 September 2023. Retrieved 15 November 2024.
  63. ^ "Treatment". nhs.uk. Attention deficit hyperactivity disorder (ADHD). 1 June 2018. Retrieved 24 October 2022.
  64. ^ Robison LS, Ananth M, Hadjiargyrou M, Komatsu DE, Thanos PK (May 2017). "Chronic oral methylphenidate treatment reversibly increases striatal dopamine transporter and dopamine type 1 receptor binding in rats". Journal of Neural Transmission. 124 (5): 655–667. doi:10.1007/s00702-017-1680-4. PMC 5400672. PMID 28116523.
  65. ^ Spencer RC, Devilbiss DM, Berridge CW (June 2015). "The cognition-enhancing effects of psychostimulants involve direct action in the prefrontal cortex". Biological Psychiatry. 77 (11): 940–950. doi:10.1016/j.biopsych.2014.09.013. PMC 4377121. PMID 25499957.
  66. ^ Ilieva IP, Hook CJ, Farah MJ (June 2015). "Prescription Stimulants' Effects on Healthy Inhibitory Control, Working Memory, and Episodic Memory: A Meta-analysis". Journal of Cognitive Neuroscience. 27 (6): 1069–1089. doi:10.1162/jocn_a_00776. PMID 25591060. S2CID 15788121. Archived from the original on 26 May 2022. Retrieved 12 June 2022.
  67. ^ Busardò FP, Kyriakou C, Cipolloni L, Zaami S, Frati P (2016). "From Clinical Application to Cognitive Enhancement: The Example of Methylphenidate". Current Neuropharmacology. 14 (1): 17–27. doi:10.2174/1570159x13666150407225902. PMC 4787280. PMID 26813119.
  68. ^ Carlier J, Giorgetti R, Varì MR, Pirani F, Ricci G, Busardò FP (January 2019). "Use of cognitive enhancers: methylphenidate and analogs". European Review for Medical and Pharmacological Sciences. 23 (1): 3–15. doi:10.26355/eurrev_201901_16741. PMID 30657540. S2CID 58643522.
  69. ^ Repantis D, Bovy L, Ohla K, Kühn S, Dresler M (February 2021). "Cognitive enhancement effects of stimulants: a randomized controlled trial testing methylphenidate, modafinil, and caffeine". Psychopharmacology. 238 (2): 441–451. doi:10.1007/s00213-020-05691-w. PMC 7826302. PMID 33201262.
  70. ^ Montgomery KA (June 2008). "Sexual desire disorders". Psychiatry. 5 (6): 50–55. PMC 2695750. PMID 19727285.
  71. ^ a b Berezanskaya J, Cade W, Best TM, Paultre K, Kienstra C (January 2022). "ADHD Prescription Medications and Their Effect on Athletic Performance: A Systematic Review and Meta-analysis". Sports Medicine - Open. 8 (1): 5. doi:10.1186/s40798-021-00374-y. PMC 8755863. PMID 35022919.
  72. ^ Thoenes MM (1 March 2011). "Heat-related illness risk with methylphenidate use". Journal of Pediatric Health Care. 25 (2): 127–132. doi:10.1016/j.pedhc.2010.07.006. PMID 21320685.
  73. ^ Docherty JR, Alsufyani HA (July 2021). "Cardiovascular and temperature adverse actions of stimulants". British Journal of Pharmacology. 178 (13): 2551–2568. doi:10.1111/bph.15465. PMID 33786822. S2CID 232431910.
  74. ^ a b c Spencer RC, Devilbiss DM, Berridge CW (June 2015). "The cognition-enhancing effects of psychostimulants involve direct action in the prefrontal cortex". Biological Psychiatry. 77 (11): 940–950. doi:10.1016/j.biopsych.2014.09.013. PMC 4377121. PMID 25499957.
  75. ^ a b Ilieva IP, Hook CJ, Farah MJ (June 2015). "Prescription Stimulants' Effects on Healthy Inhibitory Control, Working Memory, and Episodic Memory: A Meta-analysis". Journal of Cognitive Neuroscience. 27 (6): 1069–1089. doi:10.1162/jocn_a_00776. PMID 25591060. S2CID 15788121. Archived from the original on 19 September 2018. Retrieved 14 November 2018.
  76. ^ a b c d Malenka RC, Nestler EJ, Hyman SE (2009). "Higher cognitive function and behavioral control". In Sydor A, Brown RY (eds.). Molecular Neuropharmacology: A foundation for clinical neuroscience (2nd ed.). New York, NY: McGraw-Hill Medical. p. 318. ISBN 978-0-07-148127-4.
  77. ^ a b c Wood S, Sage JR, Shuman T, Anagnostaras SG (January 2014). "Psychostimulants and cognition: a continuum of behavioral and cognitive activation". Pharmacological Reviews. 66 (1): 193–221. doi:10.1124/pr.112.007054. PMC 3880463. PMID 24344115.
  78. ^ Agay N, Yechiam E, Carmel Z, Levkovitz Y (July 2010). "Non-specific effects of methylphenidate (Ritalin) on cognitive ability and decision-making of ADHD and healthy adults". Psychopharmacology. 210 (4): 511–519. doi:10.1007/s00213-010-1853-4. PMID 20424828. S2CID 17083986.
  79. ^ Twohey M (26 March 2006). "Pills become an addictive study aid". JS Online. Archived from the original on 15 August 2007. Retrieved 2 December 2007.
  80. ^ Teter CJ, McCabe SE, LaGrange K, Cranford JA, Boyd CJ (October 2006). "Illicit use of specific prescription stimulants among college students: prevalence, motives, and routes of administration". Pharmacotherapy. 26 (10): 1501–1510. doi:10.1592/phco.26.10.1501. PMC 1794223. PMID 16999660.
  81. ^ Roelands B, de Koning J, Foster C, Hettinga F, Meeusen R (May 2013). "Neurophysiological determinants of theoretical concepts and mechanisms involved in pacing". Sports Medicine. 43 (5): 301–311. doi:10.1007/s40279-013-0030-4. PMID 23456493. S2CID 30392999.
  82. ^ "Methylphenidate: Use During Pregnancy and Breastfeeding". Drugs.com. Archived from the original on 2 January 2018.
  83. ^ Humphreys C, Garcia-Bournissen F, Ito S, Koren G (July 2007). "Exposure to attention deficit hyperactivity disorder medications during pregnancy". Canadian Family Physician. 53 (7): 1153–1155. PMC 1949295. PMID 17872810.
  84. ^ Ornoy A (February 2018). "Pharmacological Treatment of Attention Deficit Hyperactivity Disorder During Pregnancy and Lactation". Pharmaceutical Research. 35 (3): 46. doi:10.1007/s11095-017-2323-z. PMID 29411149. S2CID 3663423.
  85. ^ Nutt D, King LA, Saulsbury W, Blakemore C (March 2007). "Development of a rational scale to assess the harm of drugs of potential misuse". Lancet. 369 (9566): 1047–1053. doi:10.1016/S0140-6736(07)60464-4. PMID 17382831. S2CID 5903121.
  86. ^ Coghill D, Banaschewski T, Zuddas A, Pelaz A, Gagliano A, Doepfner M (September 2013). "Long-acting methylphenidate formulations in the treatment of attention-deficit/hyperactivity disorder: a systematic review of head-to-head studies". BMC Psychiatry. 13 (1). Springer Science and Business Media LLC: 237. doi:10.1186/1471-244x-13-237. PMC 3852277. PMID 24074240.
  87. ^ a b "Ritalin LA (methylphenidate hydrochloride) extended-release capsules" (PDF). Novartis. Archived from the original (PDF) on 20 July 2011.
  88. ^ a b de Sousa A, Kalra G (January 2012). "Drug therapy of attention deficit hyperactivity disorder: current trends". Mens Sana Monographs. 10 (1): 45–69. doi:10.4103/0973-1229.87261 (inactive 2 November 2024). PMC 3353606. PMID 22654382.{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link)
  89. ^ Jaanus SD (1992). "Ocular side effects of selected systemic drugs". Optometry Clinics. 2 (4): 73–96. PMID 1363080.
  90. ^ Peterson BS, Trampush J, Maglione M, Bolshakova M, Rozelle M, Miles J, et al. (April 2024). "Treatments for ADHD in Children and Adolescents: A Systematic Review". Pediatrics. 153 (4). doi:10.1542/peds.2024-065787. PMID 38523592.
  91. ^ Bron TI, Bijlenga D, Kasander MV, Spuijbroek AT, Beekman AT, Kooij JJ (June 2013). "Long-term relationship between methylphenidate and tobacco consumption and nicotine craving in adults with ADHD in a prospective cohort study". European Neuropsychopharmacology. 23 (6): 542–554. doi:10.1016/j.euroneuro.2012.06.004. PMID 22809706. S2CID 23148548.
  92. ^ a b Cortese S, Holtmann M, Banaschewski T, Buitelaar J, Coghill D, Danckaerts M, et al. (March 2013). "Practitioner review: current best practice in the management of adverse events during treatment with ADHD medications in children and adolescents". Journal of Child Psychology and Psychiatry, and Allied Disciplines. 54 (3): 227–246. doi:10.1111/jcpp.12036. PMID 23294014.
  93. ^ Poulton A (August 2005). "Growth on stimulant medication; clarifying the confusion: a review". Archives of Disease in Childhood. 90 (8): 801–806. doi:10.1136/adc.2004.056952. PMC 1720538. PMID 16040876.
  94. ^ Hinshaw SP, Arnold LE (January 2015). "ADHD, Multimodal Treatment, and Longitudinal outcome: Evidence, paradox, and challenge". Wiley Interdisciplinary Reviews. Cognitive Science. 6 (1): 39–52. doi:10.1002/wcs.1324. PMC 4280855. PMID 25558298.
  95. ^ Findling RL, Dinh S (March 2014). "Transdermal therapy for attention-deficit hyperactivity disorder with the methylphenidate patch (MTS)". CNS Drugs. 28 (3): 217–228. doi:10.1007/s40263-014-0141-y. PMC 3933749. PMID 24532028.
  96. ^ Kraemer M, Uekermann J, Wiltfang J, Kis B (July 2010). "Methylphenidate-induced psychosis in adult attention-deficit/hyperactivity disorder: report of 3 new cases and review of the literature". Clinical Neuropharmacology. 33 (4): 204–206. doi:10.1097/WNF.0b013e3181e29174. PMID 20571380. S2CID 34956456.
  97. ^ Wingo AP, Ghaemi SN (2008). "Frequency of stimulant treatment and of stimulant-associated mania / hypomania in bipolar disorder patients". Psychopharmacology Bulletin. 41 (4): 37–47. PMID 19015628.
  98. ^ "Methylphenidate ADHD medications: Drug safety communication – risk of long-lasting erections". U.S. Food and Drug Administration (FDA). 17 December 2013. Archived from the original on 17 December 2013. Retrieved 17 December 2013.
  99. ^ "FDA drug safety communication: Safety review update of medications used to treat attention-ceficit / hyperactivity disorder (ADHD) in children and young adults". U.S. Food and Drug Administration (FDA). 20 December 2011. Archived from the original on 30 October 2013. Retrieved 4 November 2013. Cooper WO, Habel LA, Sox CM, Chan KA, Arbogast PG, Cheetham TC, et al. (November 2011). "ADHD drugs and serious cardiovascular events in children and young adults". The New England Journal of Medicine. 365 (20): 1896–1904. doi:10.1056/NEJMoa1110212. PMC 4943074. PMID 22043968. "FDA Drug Safety Communication: Safety Review Update of Medications used to treat Attention-Deficit/Hyperactivity Disorder (ADHD) in adults". U.S. Food and Drug Administration (FDA). 15 December 2011. Archived from the original on 30 October 2013. Retrieved 4 November 2013. Habel LA, Cooper WO, Sox CM, Chan KA, Fireman BH, Arbogast PG, et al. (December 2011). "ADHD medications and risk of serious cardiovascular events in young and middle-aged adults". JAMA. 306 (24): 2673–2683. doi:10.1001/jama.2011.1830. PMC 3350308. PMID 22161946.
  100. ^ Gordon N (1999). "Attention deficit hyperactivity disorder: Possible causes and treatment". International Journal of Clinical Practice. 53 (7): 524–528. doi:10.1111/j.1742-1241.1999.tb11794.x. PMID 10692738. S2CID 27462347.
  101. ^ a b c Storebø OJ, Pedersen N, Ramstad E, Kielsholm ML, Nielsen SS, Krogh HB, et al. (May 2018). "Methylphenidate for attention deficit hyperactivity disorder (ADHD) in children and adolescents - assessment of adverse events in non-randomised studies". The Cochrane Database of Systematic Reviews (Systematic Review). 5 (5): CD012069. doi:10.1002/14651858.CD012069.pub2. PMC 6494554. PMID 29744873.
  102. ^ a b Heedes G, Ailakis J. "Methylphenidate hydrochloride (PIM 344)". INCHEM. International Programme on Chemical Safety. Archived from the original on 23 June 2015. Retrieved 23 June 2015.
  103. ^ a b c d Spiller HA, Hays HL, Aleguas A (July 2013). "Overdose of drugs for attention-deficit hyperactivity disorder: Clinical presentation, mechanisms of toxicity, and management". CNS Drugs. 27 (7): 531–543. doi:10.1007/s40263-013-0084-8. PMID 23757186. S2CID 40931380.
  104. ^ Bruggisser M, Bodmer M, Liechti ME (2011). "Severe toxicity due to injected but not oral or nasal abuse of methylphenidate tablets". Swiss Medical Weekly. 141: w13267. doi:10.4414/smw.2011.13267. PMID 21984207.
  105. ^ Morton WA, Stockton GG (October 2000). "Methylphenidate Abuse and Psychiatric Side Effects". Primary Care Companion to the Journal of Clinical Psychiatry. 2 (5): 159–164. doi:10.4088/PCC.v02n0502. PMC 181133. PMID 15014637.
  106. ^ a b c Malenka RC, Nestler EJ, Hyman SE (2009). "Chapter 15: Reinforcement and addictive disorders". In Sydor A, Brown RY (eds.). Molecular Neuropharmacology: A foundation for clinical neuroscience (2nd ed.). New York: McGraw-Hill Medical. p. 368. ISBN 978-0-07-148127-4.
  107. ^ Auger RR, Goodman SH, Silber MH, Krahn LE, Pankratz VS, Slocumb NL (June 2005). "Risks of high-dose stimulants in the treatment of disorders of excessive somnolence: A case-control study". Sleep. 28 (6): 667–672. doi:10.1093/sleep/28.6.667. PMID 16477952.
  108. ^ Ishii M, Tatsuzawa Y, Yoshino A, Nomura S (April 2008). "Serotonin syndrome induced by augmentation of SSRI with methylphenidate". Psychiatry and Clinical Neurosciences. 62 (2): 246. doi:10.1111/j.1440-1819.2008.01767.x. PMID 18412855. S2CID 5659107.
  109. ^ Türkoğlu S (2015). "Serotonin syndrome with sertraline and methylphenidate in an adolescent". Clinical Neuropharmacology. 38 (2): 65–66. doi:10.1097/WNF.0000000000000075. PMID 25768857. S2CID 38523209.
  110. ^ Park YM, Jung YK (May 2010). "Manic switch and serotonin syndrome induced by augmentation of paroxetine with methylphenidate in a patient with major depression". Progress in Neuro-Psychopharmacology & Biological Psychiatry. 34 (4): 719–720. doi:10.1016/j.pnpbp.2010.03.016. PMID 20298736. S2CID 31984813.
  111. ^ Bodner RA, Lynch T, Lewis L, Kahn D (February 1995). "Serotonin syndrome". Neurology. 45 (2): 219–223. doi:10.1212/wnl.45.2.219. PMID 7854515. S2CID 35190429.
  112. ^ Patrick KS, González MA, Straughn AB, Markowitz JS (January 2005). "New methylphenidate formulations for the treatment of attention-deficit/hyperactivity disorder". Expert Opinion on Drug Delivery. 2 (1): 121–143. doi:10.1517/17425247.2.1.121. PMID 16296740. S2CID 25026467.
  113. ^ a b Markowitz JS, DeVane CL, Boulton DW, Nahas Z, Risch SC, Diamond F, et al. (June 2000). "Ethylphenidate formation in human subjects after the administration of a single dose of methylphenidate and ethanol". Drug Metabolism and Disposition. 28 (6): 620–624. PMID 10820132.
  114. ^ a b Markowitz JS, Logan BK, Diamond F, Patrick KS (August 1999). "Detection of the novel metabolite ethylphenidate after methylphenidate overdose with alcohol coingestion". Journal of Clinical Psychopharmacology. 19 (4): 362–366. doi:10.1097/00004714-199908000-00013. PMID 10440465.
  115. ^ Patrick KS, Straughn AB, Minhinnett RR, Yeatts SD, Herrin AE, DeVane CL, et al. (March 2007). "Influence of ethanol and gender on methylphenidate pharmacokinetics and pharmacodynamics". Clinical Pharmacology and Therapeutics. 81 (3): 346–353. doi:10.1038/sj.clpt.6100082. PMC 3188424. PMID 17339864.
  116. ^ Roberts SM, DeMott RP, James RC (1997). "Adrenergic modulation of hepatotoxicity". Drug Metabolism Reviews. 29 (1–2): 329–353. doi:10.3109/03602539709037587. PMID 9187524.
  117. ^ Markowitz JS, Patrick KS (June 2008). "Differential pharmacokinetics and pharmacodynamics of methylphenidate enantiomers: Does chirality matter?". Journal of Clinical Psychopharmacology. 28 (3 Suppl 2): S54–S61. doi:10.1097/JCP.0b013e3181733560. PMID 18480678.
  118. ^ Williard RL, Middaugh LD, Zhu HJ, Patrick KS (February 2007). "Methylphenidate and its ethanol transesterification metabolite ethylphenidate: brain disposition, monoamine transporters and motor activity". Behavioural Pharmacology. 18 (1): 39–51. doi:10.1097/fbp.0b013e3280143226. PMID 17218796. S2CID 20232871.
  119. ^ a b Markowitz JS, DeVane CL, Pestreich LK, Patrick KS, Muniz R (December 2006). "A comprehensive in vitro screening of d-, l-, and dl-threo-methylphenidate: an exploratory study". Journal of Child and Adolescent Psychopharmacology. 16 (6): 687–698. doi:10.1089/cap.2006.16.687. PMID 17201613. S2CID 22895177.
  120. ^ a b Malenka RC, Nestler EJ, Hyman SE (2009). "Chapter 6: Widely projecting systems: Monoamines, acetylcholine, and orexin". In Sydor A, Brown RY (eds.). Molecular Neuropharmacology: A foundation for clinical neuroscience (2nd ed.). New York: McGraw-Hill Medical. pp. 154–157. ISBN 978-0-07-148127-4.
  121. ^ Steele M, Weiss M, Swanson J, Wang J, Prinzo RS, Binder CE (2006). "A randomized, controlled effectiveness trial of OROS-methylphenidate compared to usual care with immediate-release methylphenidate in attention deficit-hyperactivity disorder". The Canadian Journal of Clinical Pharmacology. 13 (1): e50–e62. PMID 16456216. Archived from the original (PDF) on 15 December 2011.
  122. ^ a b c Heal DJ, Pierce DM (2006). "Methylphenidate and its isomers: their role in the treatment of attention-deficit hyperactivity disorder using a transdermal delivery system". CNS Drugs. 20 (9): 713–738. doi:10.2165/00023210-200620090-00002. PMID 16953648. S2CID 39535277.
  123. ^ Iversen L (January 2006). "Neurotransmitter transporters and their impact on the development of psychopharmacology". British Journal of Pharmacology. 147 (Suppl 1): S82–S88. doi:10.1038/sj.bjp.0706428. PMC 1760736. PMID 16402124.
  124. ^ Volkow ND, Fowler JS, Wang G, Ding Y, Gatley SJ (1 January 2002). "Mechanism of action of methylphenidate: insights from PET imaging studies". Journal of Attention Disorders. 6 (Suppl 1): S31–S43. doi:10.1177/070674370200601s05. PMID 12685517. S2CID 9132302.
  125. ^ Hart H, Radua J, Nakao T, Mataix-Cols D, Rubia K (February 2013). "Meta-analysis of functional magnetic resonance imaging studies of inhibition and attention in attention-deficit/hyperactivity disorder: exploring task-specific, stimulant medication, and age effects". JAMA Psychiatry. 70 (2): 185–198. doi:10.1001/jamapsychiatry.2013.277. PMID 23247506.
  126. ^ Spencer TJ, Brown A, Seidman LJ, Valera EM, Makris N, Lomedico A, et al. (September 2013). "Effect of psychostimulants on brain structure and function in ADHD: a qualitative literature review of magnetic resonance imaging-based neuroimaging studies". The Journal of Clinical Psychiatry. 74 (9): 902–917. doi:10.4088/JCP.12r08287. PMC 3801446. PMID 24107764.
  127. ^ a b Frodl T, Skokauskas N (February 2012). "Meta-analysis of structural MRI studies in children and adults with attention deficit hyperactivity disorder indicates treatment effects". Acta Psychiatrica Scandinavica. 125 (2): 114–126. doi:10.1111/j.1600-0447.2011.01786.x. PMID 22118249. S2CID 25954331.
  128. ^ Viggiano D, Vallone D, Sadile A (2004). "Dysfunctions in dopamine systems and ADHD: evidence from animals and modeling". Neural Plasticity. 11 (1–2): 97–114. doi:10.1155/NP.2004.97. PMC 2565441. PMID 15303308.
  129. ^ "Focalin XR". RxList. Archived from the original on 6 August 2020. Retrieved 5 February 2020.
  130. ^ "Concerta XL 18 mg – 54 mg prolonged release tablets". eMC. Archived from the original on 17 October 2017.
  131. ^ a b Miller GM (January 2011). "The emerging role of trace amine-associated receptor 1 in the functional regulation of monoamine transporters and dopaminergic activity". Journal of Neurochemistry. 116 (2): 164–176. doi:10.1111/j.1471-4159.2010.07109.x. PMC 3005101. PMID 21073468.
  132. ^ a b Eiden LE, Weihe E (January 2011). "VMAT2: a dynamic regulator of brain monoaminergic neuronal function interacting with drugs of abuse". Annals of the New York Academy of Sciences. 1216 (1): 86–98. Bibcode:2011NYASA1216...86E. doi:10.1111/j.1749-6632.2010.05906.x. PMC 4183197. PMID 21272013.
  133. ^ a b Sulzer D, Cragg SJ, Rice ME (August 2016). "Striatal dopamine neurotransmission: regulation of release and uptake". Basal Ganglia. 6 (3): 123–148. doi:10.1016/j.baga.2016.02.001. PMC 4850498. PMID 27141430.
  134. ^ a b Liu F, Minami H, Silva RR (December 2006). "Dexmethylphenidate hydrochloride in the treatment of attention deficit hyperactivity disorder". Neuropsychiatric Disease and Treatment. 2 (4): 467–473. doi:10.2147/nedt.2006.2.4.467. PMC 2671958. PMID 19412495.
  135. ^ Markowitz JS, DeVane CL, Ramamoorthy S, Zhu HJ (February 2009). "The psychostimulant d-threo-(R,R)-methylphenidate binds as an agonist to the 5HT(1A) receptor". Die Pharmazie. 64 (2): 123–125. PMID 19322953.
  136. ^ a b Volkow ND, Wang GJ, Fowler JS, Gatley SJ, Ding YS, Logan J, et al. (September 1996). "Relationship between psychostimulant-induced "high" and dopamine transporter occupancy". Proceedings of the National Academy of Sciences of the United States of America. 93 (19): 10388–10392. Bibcode:1996PNAS...9310388V. doi:10.1073/pnas.93.19.10388. PMC 38394. PMID 8816810.
  137. ^ Shoptaw S, Heinzerling KG, Rotheram-Fuller E, Steward T, Wang J, Swanson AN, et al. (August 2008). "Randomized, placebo-controlled trial of bupropion for the treatment of methamphetamine dependence". Drug and Alcohol Dependence. 96 (3): 222–232. doi:10.1016/j.drugalcdep.2008.03.010. PMC 3652530. PMID 18468815.
  138. ^ Heal DJ, Gosden J, Smith SL (December 2014). "Dopamine reuptake transporter (DAT) "inverse agonism" – a novel hypothesis to explain the enigmatic pharmacology of cocaine". Neuropharmacology. 87: 19–40. doi:10.1016/j.neuropharm.2014.06.012. PMID 24953830. S2CID 4660652.
  139. ^ a b Volz TJ (December 2008). "Neuropharmacological mechanisms underlying the neuroprotective effects of methylphenidate". Current Neuropharmacology. 6 (4): 379–385. doi:10.2174/157015908787386041. PMC 2701286. PMID 19587858.
  140. ^ "Concerta". Drugs.com. 1 October 2018. Archived from the original on 29 September 2018. Retrieved 11 March 2019.
  141. ^ Chan YP, Swanson JM, Soldin SS, Thiessen JJ, Macleod SM, Logan W (July 1983). "Methylphenidate hydrochloride given with or before breakfast: II. Effects on plasma concentration of methylphenidate and ritalinic acid". Pediatrics. 72 (1): 56–59. doi:10.1542/peds.72.1.56. PMID 6866592. S2CID 28806553. Archived from the original on 17 December 2021. Retrieved 12 December 2021.
  142. ^ "Cotempla XR-ODT- methylphenidate tablet, orally disintegrating". DailyMed. 1 July 2021. Archived from the original on 26 May 2022. Retrieved 25 May 2022.
  143. ^ "Quillivant XR- methylphenidate hydrochloride suspension, extended release". DailyMed. 30 June 2021. Archived from the original on 26 May 2022. Retrieved 26 May 2022.
  144. ^ Lee L, Kepple J, Wang Y, Freestone S, Bakhtiar R, Wang Y, et al. (September 2003). "Bioavailability of modified-release methylphenidate: influence of high-fat breakfast when administered intact and when capsule content sprinkled on applesauce". Biopharmaceutics & Drug Disposition. 24 (6): 233–243. doi:10.1002/bdd.358. PMID 12973820. S2CID 29609987.
  145. ^ Sun Z, Murry DJ, Sanghani SP, Davis WI, Kedishvili NY, Zou Q, et al. (August 2004). "Methylphenidate is stereoselectively hydrolyzed by human carboxylesterase CES1A1". The Journal of Pharmacology and Experimental Therapeutics. 310 (2): 469–476. doi:10.1124/jpet.104.067116. PMID 15082749. S2CID 24233422.
  146. ^ Preedy VR (2016). Neuropathology of Drug Addictions and Substance Misuse. Vol. 3: General processes and mechanisms, prescription medications, caffeine and areca, polydrug misuse, emerging addictions, and non-drug addictions. Academic Press. p. 651. ISBN 978-0-12-800677-1. Archived from the original on 29 August 2021. Retrieved 19 December 2018.
  147. ^ Bagot KS, Kaminer Y (April 2014). "Efficacy of stimulants for cognitive enhancement in non-attention deficit hyperactivity disorder youth: A systematic review". Addiction. 109 (4): 547–557. doi:10.1111/add.12460. PMC 4471173. PMID 24749160.
  148. ^ Froimowitz M, Patrick KS, Cody V (October 1995). "Conformational analysis of methylphenidate and its structural relationship to other dopamine reuptake blockers such as CFT". Pharmaceutical Research. 12 (10): 1430–1434. doi:10.1023/A:1016262815984. PMID 8584475. S2CID 26097197.
  149. ^ Prashad M (2001). "Approaches to the Preparation of Enantiomerically Pure (2R,2′R)-(+)-threo-Methylphenidate Hydrochloride". Adv. Synth. Catal. 343 (5): 379–392. doi:10.1002/1615-4169(200107)343:5<379::AID-ADSC379>3.0.CO;2-4.
  150. ^ Axten JM, Krim L, Kung HF, Winkler JD (1998). "A Stereoselective Synthesis ofdl-threo-Methylphenidate: Preparation and Biological Evaluation of Novel Analogues". The Journal of Organic Chemistry. 63 (26): 9628–9629. doi:10.1021/jo982214t.
  151. ^ Singh S (March 2000). "Chemistry, design, and structure-activity relationship of cocaine antagonists". Chemical Reviews. 100 (3): 925–1024. doi:10.1021/cr9700538. PMID 11749256.
  152. ^ Baselt R, ed. (2011). Disposition of Toxic Drugs and Chemicals in Man (9th ed.). Seal Beach, CA: Biomedical Publications. pp. 1091–1093.
  153. ^ a b Lange KW, Reichl S, Lange KM, Tucha L, Tucha O (December 2010). "The history of attention deficit hyperactivity disorder". Attention Deficit and Hyperactivity Disorders. 2 (4): 241–255. doi:10.1007/s12402-010-0045-8. PMC 3000907. PMID 21258430.
  154. ^ Wenthur CJ (August 2016). "Classics in chemical neuroscience: Methylphenidate". ACS Chem Neurosci. 7 (8): 1030–1040. doi:10.1021/acschemneuro.6b00199. PMID 27409720.
  155. ^ Panizzon L (1944). "La preparazione di piridile piperidil-arilacetonitrili e di alcuni prodotti di trasformazione (Parte Ia)". Helvetica Chimica Acta. 27: 1748–1756. doi:10.1002/hlca.194402701222.
  156. ^ Myers RL (1 January 2007). The 100 Most Important Chemical Compounds: A reference guide. ABC-CLIO. p. 178. ISBN 978-0-313-33758-1. Archived from the original on 2 February 2017. Retrieved 24 September 2016 – via Google Books.
  157. ^ a b c d Heal DJ, Pierce DM (2006). "Methylphenidate and its isomers: their role in the treatment of attention-deficit hyperactivity disorder using a transdermal delivery system". CNS Drugs. 20 (9): 713–738. doi:10.2165/00023210-200620090-00002. PMID 16953648. S2CID 39535277.
  158. ^ Meier R, Gross F, Tripod J (May 1954). "Ritalin, eine neuartige synthetische Verbindung mit spezifischer zentralerregender Wirkungskomponente" [Ritalin, a new synthetic compound with specific analeptic components]. Klinische Wochenschrift (in German). 32 (19–20): 445–450. doi:10.1007/BF01466968. PMID 13164273. S2CID 24516999.
  159. ^ Wood S, Sage JR, Shuman T, Anagnostaras SG (2014). "Psychostimulants and cognition: A continuum of behavioral and cognitive activation". Pharmacol Rev. 66 (1): 193–221. doi:10.1124/pr.112.007054. PMC 3880463. PMID 24344115.
  160. ^ US 2507631, Hartmann, M.; Panizzon, L., "Pyridine and piperidine compounds and process of making same", issued 16 May 1950, assigned to CIBA Pharmaceutical Products, Inc 
  161. ^ US 2838519, Rouietscji, R., "Process for the conversion of stereoisomers", issued 10 June 1958, assigned to CIBA Pharmaceutical Products, Inc 
  162. ^ US 2957880, Rouietscji, R., "Process for the conversion of stereoisomers", issued 25 October 1960, assigned to CIBA Pharmaceutical Products, Inc 
  163. ^ Myers RL (August 2007). The 100 Most Important Chemical Compounds: A reference guide. ABC-CLIO. p. 178. ISBN 978-0-313-33758-1. Retrieved 10 September 2010. ... named ritalin after his wife ...
  164. ^ Stolerman I (2010). Encyclopedia of Psychopharmacology. Berlin, DE / London, UK: Springer. p. 763. ISBN 978-3-540-68698-9.
  165. ^ McCrossin S (1995). Ritalin and attention deficit disorder: History of its use, effects, and side effects (PDF) (Report). Archived from the original (PDF) on 24 August 2012. Retrieved 22 July 2014.
  166. ^ Bradley C (January 1950). "Benzedrine and dexedrine in the treatment of children's behavior disorders". Pediatrics. 5 (1): 24–37. doi:10.1542/peds.5.1.24. PMID 15404645. S2CID 45655000.
  167. ^ Woodworth T (16 May 2000). DEA Congressional Testimony (Report). U.S. Drug Enforcement Administration. Archived from the original on 12 October 2007. Retrieved 2 November 2007.
  168. ^ "Drug Approval Package: Concerta (methylphenidate HCI) NDA #21-121". fda.gov. 24 December 1999. Archived from the original on 27 March 2022. Retrieved 26 March 2022.
  169. ^ "Newly Approved Drug Therapies (637) Concerta, Alza". CenterWatch. Archived from the original on 16 December 2010. Retrieved 30 April 2011.
  170. ^ "Narcotics monitoring board reports 66% increase in global consumption of methylphenidate". The Pharmaceutical Journal. 294 (7853). Royal Pharmaceutical Society. 4 March 2015. doi:10.1211/PJ.2015.20068042. Archived from the original on 19 December 2018. Retrieved 19 December 2018.
  171. ^ a b Moscibrodzki P, Katz C (8 December 2018). Application for inclusion to the 22nd expert committee on the selection and use of essential medicines: Methylphenidate hydrochloride (PDF) (Report). World Health Organization. Archived (PDF) from the original on 6 August 2020. Retrieved 16 November 2019.
  172. ^ Foquest: Methylphenidate hydrochloride controlled release capsules (PDF) (vers. E). Product Monograph. Pickering, Ontario, Canada: Purdue Pharma. 1 March 2019. Submission Control Nr 214860. Retrieved 14 December 2022 – via caddra.ca.
  173. ^ "Education / training". Illinois DocAssist. Clinical resources. Chicago, IL: University of Illinois. Archived from the original on 1 January 2013. Retrieved 26 July 2012. Ritalin‑SR, methylphenidate SR, Methylin ER, and Metadate ER are the same formulation and have the same drug delivery system
  174. ^ "Comparative bioavailability". Apo‑methylphenidate SR (PDF) (product monograph). Apotex Inc. 31 March 2005. Retrieved 26 July 2012.[permanent dead link]
  175. ^ "New product: Sandoz methylphenidate SR 20 mg" (PDF) (Press release). Sandoz Canada Inc. 5 May 2009. Archived (PDF) from the original on 3 December 2012. Retrieved 26 July 2012. An alternative to Ritalin‑SR from Novartis
  176. ^ "FDA approved drug products". Drugs@FDA. US Food and Drug Administration. Archived from the original on 2 October 2016. Retrieved 1 October 2016.[failed verification]
  177. ^ Hosenbocus S, Chahal R (November 2009). "A review of long-acting medications for ADHD in Canada". Journal of the Canadian Academy of Child and Adolescent Psychiatry. 18 (4): 331–339. PMC 2765387. PMID 19881943.
  178. ^ "Aptensio XR Prescribing Information" (PDF). Archived (PDF) from the original on 2 February 2017. Retrieved 15 April 2017.
  179. ^ a b c d e Moses S (26 July 2009). "Methylphenidate". Family Practice Notebook. Archived from the original on 14 September 2012. Retrieved 7 August 2012.
  180. ^ "Daytrana transdermal". WebMD. Archived from the original on 11 June 2015. Retrieved 11 June 2015.
  181. ^ "Quillichew ER (methylphenidate HCl extended-release chewable tablets CII)". Pfizer Medical Information (pfizermedicalinformation.com) (Press release). U.S.: Pfizer. Archived from the original on 16 April 2017. Retrieved 16 April 2017.
  182. ^ a b "Jornay PM Full Prescribing Information" (PDF). accessdata.fda.gov. FDA. Retrieved 27 April 2024.
  183. ^ "Concerta for Kids with ADHD". Pediatrics.about.com. 1 April 2003. Archived from the original on 7 January 2011.
  184. ^ "Concerta (methylphenidate extended-release tablets)". RxList. Drug information: User reviews, side effects, drug interactions, and dosage. Archived from the original on 26 March 2011. Retrieved 30 April 2011.
  185. ^ "Metadate CD". Archived from the original on 10 July 2011.
  186. ^ Coghill D, Banaschewski T, Zuddas A, Pelaz A, Gagliano A, Doepfner M (September 2013). "Long-acting methylphenidate formulations in the treatment of attention-deficit/hyperactivity disorder: a systematic review of head-to-head studies". BMC Psychiatry. 13: 237. doi:10.1186/1471-244X-13-237. PMC 3852277. PMID 24074240.
  187. ^ "UK Report on Ritalin". p. 9. Retrieved 9 January 2024.
  188. ^ Steingard R, Taskiran S, Connor DF, Markowitz JS, Stein MA (June 2019). "New Formulations of Stimulants: An Update for Clinicians". J Child Adolesc Psychopharmacol. 29 (5): 324–339. doi:10.1089/cap.2019.0043. PMC 7207053. PMID 31038360.
  189. ^ Methylphenidate transdermal system (MTS) (PDF) (safety summary). Noven Pharmaceuticals. 24 October 2005. NDA No. 21-514, Appendix 3. Archived from the original (PDF) on 30 September 2007. Retrieved 17 January 2022 – via U.S. Food and Drug Administration.
  190. ^ Heal DJ, Pierce DM (2006). "Methylphenidate and its isomers: their role in the treatment of attention-deficit hyperactivity disorder using a transdermal delivery system". CNS Drugs. 20 (9): 713–738. doi:10.2165/00023210-200620090-00002. PMID 16953648. S2CID 39535277. Anderson VR, Scott LJ (2006). "Methylphenidate transdermal system: In attention-deficit hyperactivity disorder in children". Drugs. 66 (8): 1117–1126. doi:10.2165/00003495-200666080-00007. PMID 16789796. S2CID 46975783.
  191. ^ Green List: Annex to the annual statistical report on psychotropic substances (form P) (PDF) (Report) (23rd ed.). Vienna International Centre, Austria: International Narcotics Board. August 2003. (1.63 MB). Archived from the original (PDF) on 31 August 2012. Retrieved 2 March 2006.
  192. ^ "Poisons Standard 2012 as amended made under paragraph 52D(2)(a) of the Therapeutic Goods Act 1989". Therapeutic Goods Administration. 27 November 2014. Archived from the original on 1 July 2015. Retrieved 28 June 2015.
  193. ^ Controlled Drugs and Substances Act (Report). Laws. Department of Justice, Government of Canada. 25 April 2017. S.C. 1996, c. 19. Archived from the original on 3 April 2011. Retrieved 26 April 2017.
  194. ^ "FIJI ISLANDS ILLICIT DRUGS CONTROL ACT 2004" (PDF). health.gov.fj. Archived from the original (PDF) on 13 July 2018. Retrieved 5 August 2023.
  195. ^ "TDAH : la prescription de méthylphénidate peut désormais être initiée en villexxxxxxxxx". VIDAL (in French).
  196. ^ "Dangerous Drugs Ordinance". Hong Kong e-Legislation. 1438402701417-001. Archived from the original on 28 August 2021. Retrieved 20 March 2019.
  197. ^ The Drugs and Cosmetics Rules (Report). Ministry of Health & Family Welfare. Government of India. 15 August 2013 [1945]. pp. 729–730. Archived from the original on 8 August 2016. Retrieved 5 December 2016.
  198. ^ Mehta R (26 February 2014). Drug Law Enforcement Field Officers' Hand Book (PDF) (Report). Narcotics Control Bureau, Ministry of Home Affairs. Government of India. p. 145. Archived from the original (PDF) on 5 March 2017. Retrieved 5 December 2016.
  199. ^ "Decree of the Government of Russian Federation on 25 October 2014" (PDF). No. 1102. Archived (PDF) from the original on 26 March 2015. Retrieved 17 October 2019.
  200. ^ "Narkotikastrafflag (1968:64)". Ministry of Justice. Archived from the original on 6 October 2013. Retrieved 15 January 2014.
  201. ^ "Schedule 2: Controlled Drugs". Misuse of Drugs Act (c. 38) (Report). Office of Public Sector Information. 1971. Archived from the original on 28 August 2021. Retrieved 15 June 2009.
  202. ^ Finlator J (28 October 1971). "Phenmetrazine and its salts, and Methylphenidate" (PDF). Isomer Design. Bureau of Narcotics and Dangerous Drugs. Archived (PDF) from the original on 3 March 2022. Retrieved 16 January 2023.
  203. ^ Lakhan SE, Hagger-Johnson GE (October 2007). "The impact of prescribed psychotropics on youth". Clinical Practice and Epidemiology in Mental Health. 3 (1): 21. doi:10.1186/1745-0179-3-21. PMC 2100041. PMID 17949504.
  204. ^ "New research helps explain ritalin's low abuse potential when taken as prescribed". NIH.gov. 29 September 1998. Archived from the original on 28 May 2010. Retrieved 30 April 2011.
  205. ^ "Stimulant ADHD medications: Methylphenidate and amphetamines". Drugabuse.gov. NIDA InfoFacts. Archived from the original on 26 March 2010. Retrieved 30 April 2011.
  206. ^ Schoenfelder EN, Faraone SV, Kollins SH (June 2014). "Stimulant treatment of ADHD and cigarette smoking: A meta-analysis". Pediatrics. 133 (6): 1070–1080. doi:10.1542/peds.2014-0179. PMC 4531271. PMID 24819571.
  207. ^ Wilens TE, Faraone SV, Biederman J, Gunawardene S (January 2003). "Does stimulant therapy of attention-deficit/hyperactivity disorder beget later substance abuse? A meta-analytic review of the literature". Pediatrics. 111 (1): 179–185. doi:10.1542/peds.111.1.179. PMID 12509574. S2CID 29956425.
  208. ^ Karlstad Ø, Zoëga H, Furu K, Bahmanyar S, Martikainen JE, Kieler H, et al. (December 2016). "Use of drugs for ADHD among adults-a multinational study among 15.8 million adults in the Nordic countries". European Journal of Clinical Pharmacology. 72 (12): 1507–1514. doi:10.1007/s00228-016-2125-y. PMC 5110707. PMID 27586399.
  209. ^ Bjarnadottir GD, Haraldsson HM, Rafnar BO, Sigurdsson E, Steingrimsson S, Johannsson M, et al. (29 November 2016). "Prevalent intravenous abuse of methylphenidate among treatment-seeking patients with substance abuse disorders: a descriptive population-based study". Journal of Addiction Medicine. 9 (3): 188–194. doi:10.1097/ADM.0000000000000115. PMC 4450903. PMID 25748561.
  210. ^ Ouellette EM (1991). "Legal issues in the treatment of children with attention deficit hyperactivity disorder". Journal of Child Neurology. 6 (Suppl): S68–S75. doi:10.1177/0883073891006001S08. PMID 2002217. S2CID 1773939.
  211. ^ Ruthirakuhan MT, Herrmann N, Abraham EH, Chan S, Lanctôt KL (May 2018). "Pharmacological interventions for apathy in Alzheimer's disease". Cochrane Database Syst Rev. 5 (5): CD012197. doi:10.1002/14651858.CD012197.pub2. PMC 6494556. PMID 29727467.
  212. ^ Lee CW, Chen JY, Ko CC, Chuang MH, Tsai WW, Sun CK, et al. (December 2022). "Efficacy of methylphenidate for the treatment of apathy in patients with Alzheimer's disease: a systematic review and meta-analysis of randomized controlled studies". Psychopharmacology (Berl). 239 (12): 3743–3753. doi:10.1007/s00213-022-06261-y. PMID 36243827.
  213. ^ Theleritis C, Siarkos K, Katirtzoglou E, Politis A (January 2017). "Pharmacological and Nonpharmacological Treatment for Apathy in Alzheimer Disease : A systematic review across modalities". Journal of Geriatric Psychiatry and Neurology. 30 (1): 26–49. doi:10.1177/0891988716678684. PMID 28248559. S2CID 24642197.
  214. ^ a b Spiegel DR, Warren A, Takakura W, Servidio L, Leu N (January 2018). "Disorders of diminished motivation: What they are, and how to treat them" (PDF). Current Psychiatry. 17 (1): 10–18, 20.
  215. ^ Arnts H, van Erp WS, Lavrijsen JC, van Gaal S, Groenewegen HJ, van den Munckhof P (May 2020). "On the pathophysiology and treatment of akinetic mutism". Neurosci Biobehav Rev. 112: 270–278. doi:10.1016/j.neubiorev.2020.02.006. hdl:2066/225901. PMID 32044373.
  216. ^ Elkashef A, Vocci F, Hanson G, White J, Wickes W, Tiihonen J (2008). "Pharmacotherapy of methamphetamine addiction: an update". Substance Abuse. 29 (3): 31–49. doi:10.1080/08897070802218554. PMC 2597382. PMID 19042205.
  217. ^ Grabowski J, Roache JD, Schmitz JM, Rhoades H, Creson D, Korszun A (December 1997). "Replacement medication for cocaine dependence: methylphenidate". Journal of Clinical Psychopharmacology. 17 (6): 485–488. doi:10.1097/00004714-199712000-00008. PMID 9408812.
  218. ^ "Understanding drug abuse and addiction: What science says". US National Institute on Drug Addiction. 1 February 2019. Retrieved 11 February 2023.
  219. ^ Shearer J (May 2008). "The principles of agonist pharmacotherapy for psychostimulant dependence". Drug and Alcohol Review. 27 (3): 301–308. doi:10.1080/09595230801927372. PMID 18368612.
  220. ^ Villas-Boas CB, Chierrito D, Fernandez-Llimos F, Tonin FS, Sanches AC (March 2019). "Pharmacological treatment of attention-deficit hyperactivity disorder comorbid with an anxiety disorder: a systematic review". Int Clin Psychopharmacol. 34 (2): 57–64. doi:10.1097/YIC.0000000000000243. PMID 30422834. In a retrospective analysis of a case series, the monotherapy with extendedrelease methylphenidate was seen to be effective in reducing ADHD and social AD symptoms evaluated by the Adult ADHD Self-Report Scale (ASRS) and Liebowitz Social Anxiety Scale (LSAS) (Koyuncu et al., 2017).
  221. ^ Koyuncu A, İnce E, Ertekin E, Tükel R (2019). "Comorbidity in social anxiety disorder: diagnostic and therapeutic challenges". Drugs Context. 8: 212573. doi:10.7573/dic.212573. PMC 6448478. PMID 30988687. Attention-deficit/hyperactivity disorder (ADHD), another childhood disorder that extends over adulthood, is an overlooked condition that has high rates of comorbidity with SAD.31 Only recently increasing evidence suggests that the relationship between the two disorders is closer than that was thought before. Several studies found high rates (up to 60–70%) of childhood ADHD comorbidity, especially predominantly inattentive type, in adults with SAD.67,157,158 In addition, follow-up studies showed that the lifetime prevalence of SAD among ADHD patients is higher compared to healthy controls.159 In treatment studies investigating patients with SAD plus ADHD comorbidity found that ADHD medications such as methylphenidate or atomoxetine could effectively improve symptoms of both disorders at the same time.160–163 According to a developmental hypothesis, SAD may be etiologically linked to ADHD in a subgroup of patients, and thus SAD may develop secondary to ADHD.31
  222. ^ Pelissolo A, Abou Kassm S, Delhay L (December 2019). "Therapeutic strategies for social anxiety disorder: where are we now?". Expert Rev Neurother. 19 (12): 1179–1189. doi:10.1080/14737175.2019.1666713. PMID 31502896. Recently, clinical studies have found high rates of Attention-deficit/hyperactivity disorder (ADHD) in SAD children (up to 60-%), but also in adults [98]. Koyuncu et al. proposed a "developmental hypothesis", suggesting that SAD may be etiologically linked to ADHD in a subgroup of patients. The impact of this association on response to treatment still needs investigations, but preliminary studies showed that atomoxetine and methylphenidate can be effective in treating both ADHD and comorbid SAD [99,100].
  223. ^ Golubchik P, Sever J, Weizman A (July 2014). "Methylphenidate treatment in children with attention deficit hyperactivity disorder and comorbid social phobia". Int Clin Psychopharmacol. 29 (4): 212–215. doi:10.1097/YIC.0000000000000029. PMC 4047304. PMID 24448460.
  224. ^ Koyuncu A, Çelebi F, Ertekin E, Kahn DA (May 2015). "Extended-release Methylphenidate Treatment and Outcomes in Comorbid Social Anxiety Disorder and Attention-deficit/Hyperactivity Disorder: 2 Case Reports". J Psychiatr Pract. 21 (3): 225–231. doi:10.1097/PRA.0000000000000070. PMID 25955266.
  225. ^ Koyuncu A, Çelebi F, Ertekin E, Kök BE, Tükel R (November 2017). "Extended-release methylphenidate monotherapy in patients with comorbid social anxiety disorder and adult attention-deficit/hyperactivity disorder: retrospective case series". Ther Adv Psychopharmacol. 7 (11): 241–247. doi:10.1177/2045125317714193. PMC 5638159. PMID 29090087.
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