what kind of drug is vyvanse classified as
Lisdexamfetamine Lisdexamfetamine (contracted from L-lysine-dextroamphetamine) is a prodrug of the central nervous system (CNS) stimulant dextroamphetamine, a phenethylamine of the amphetamine class that is used in the treatment of attention deficit hyperactivity disorder (ADHD) and binge eating disorder.[6][7] Its chemical structure consists of dextroamphetamine coupled with the essential amino acid L-lysine. Lisdexamfetamine itself is inactive prior to its absorption and the subsequent rate-limited enzymatic cleavage of the molecule's L-lysine portion, which produces the active metabolite (dextroamphetamine).
Fenfluramine/phentermine After reports of valvular heart disease and pulmonary hypertension, primarily in women who had been undergoing treatment with fen-phen or (dex)fenfluramine, the FDA requested its withdrawal from the market in September 1997.[7]