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Ritalin_LA: profile and news
Other information Indication Children with attention deficit disorders Pharmacology Methylphenidate, a central nervous system stimulant chemically similar to the amphetamines, is used to treat narcolepsy, attention-deficit hyperactivity disorder (ADHD) in children, post-stroke depression or other depressive disorders. Mechanism Of Action Methylphenidate blocks dopamine uptake in central adrenergic neurons by blocking dopamine transport or carrier proteins. Methylphenidate acts at the brain stem arousal system and the cerebral cortex and causes increased sympathomimetic activity in the central nervous system. Alteration of serotonergic pathways via changes in dopamine transport may result. Drug Category Adrenergic Agents; Dopamine Agents; Central Nervous System Agents; Anorexigenic Agents; Stimulants; ATC:N06BA04 Brand Names/Synonyms 4311/B Ciba; C 4311; CHEMBANK1663; Calocain; Centedein; Centedrin; Centedrine; Centredin; Concerta; Dea No. 1724; Focalin; Focalin Xr; HSDB 3126; METHYLPHEN; Meridil; Metadate; Metadate Cd; Metadate Er; Methyl Phenidyl Acetate; Methylin; Methylin Er; Methylofenidan; Methylphenidan; Methylphenidate; Methylphenidate Hcl; Methylphenidate Hydrochloride; Methylphenidatum [Inn-Latin]; Methylphenidylacetate Hydrochloride; Methypatch; Metilfenidat Hydrochloride; Metilfenidato [Inn-Spanish]; Metilfenidato [Italian]; Phenidylate; Plimasine; Pms-Methylphenidate; Riphenidate; Ritalin; Ritalin Hydrochloride; Ritalin La; Ritalin Sr; Ritalin-Sr; Ritaline; Ritcher Works Dosage Forms Tablets, SR tablets Absorption readily absorbed in a biphasic manner. It reaches peak absorption at approximately two hours for the first phase and five hours for the second phase. bioavailability is low (approx. 30%) Interactions -->Interactions for Methylphenidate: Ritalin may decrease the hypotensive effect of guanethidine. Use cautiously with pressor agents. Human pharmacologic studies have shown that Ritalin may inhibit the metabolism of coumarin anticoagulants, anticonvulsants (phenobarbital, diphenylhydantoin, primidone), phenylbutazone, and tricyclic drugs (imipramine, clomipramine, desipramine). Downward dosage adjustments of these drugs may be required when given concomitantly with Ritalin. Serious adverse events have been reported in concomitant use with clonidine, although no causality for the combination has been established. The safety of using methylphenidate in combination with clonidine or other centrally acting alpha-2 agonists has not been systemically evaluated. |
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