Wiktionary
dexmethylphenidate
n. A psychostimulant, a dopamine reuptake inhibitor that affects the central nervous system.
Wikipedia
Dexmethylphenidate
Dexmethylphenidate (trade names Focalin, Attenade; also known as d-threo-methylphenidate (D-TMP)) is a central nervous system (CNS) stimulant of the phenethylamine and piperidine classes that is used in the treatment of attention deficit hyperactivity disorder (ADHD) and narcolepsy. It is the active dextrorotatory enantiomer of methylphenidate.