Dexmethylphenidate (sold commercially by Novartis as Focalin, available generically as well) is a pharmaceutical drug used to treat Attention Deficit Hyperactivity Disorder. It is very similar to Ritalin, but it only contains the d-isomer of methylphenidate. It is a stimulant that affects the central nervous system. Dexmethylphenidate has approximately a 6-hour duration of effect (the XR version spans 12 hours covering a full day), and has been demonstrated to be more effective than methylphenidate at reducing the symptoms of childhood ADHD.
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A substance that is being studied in the treatment of fatigue and nervous system side effects caused by chemotherapy. It belongs to the family of drugs called centralnervous system stimulants.