what is the last one used for?
It is used in the treatment of attention deficit hyperactivity disorder (ADHD), narcolepsy, and obesity.
Amphetamine
. It is used in the treatment of attention deficit hyperactivity disorder (ADHD), narcolepsy, and obesity. 
who was the dude in the big lebowski Jeffrey Lebowski is it a film or a series? A crime comedy film who are the actors in it? Jeff Bridges, Julianne Moore, Steve Buscemi, David Huddleston, John Turturro and Philip Seymour Hoffman where was it filmed? Los Angeles when did the last actor make his acting debut? He made his screen debut in 1991, in a "Law & Order" episode called "The Violence of Summer" has he been to acting school? Yes, He received a drama degree in 1989. which other films was he a part of? "The Savages", "Synecdoche, New York", "Twister" what was the cause of his death? It was  caused by "acute mixed drug intoxication, including heroin, cocaine, benzodiazepines, and amphetamine".
wiki:1562356
Amphetamine [SEP] Introduction
Amphetamine (contracted from alpha-methylphenethylamine) is a central nervous system (CNS) stimulant marketed under the brand name Evekeo, among others. It is used in the treatment of attention deficit hyperactivity disorder (ADHD), narcolepsy, and obesity. Amphetamine was discovered in 1887 and exists as two enantiomers: levoamphetamine and dextroamphetamine. "Amphetamine" properly refers to a specific chemical, the racemic free base, which is equal parts of the two enantiomers, levoamphetamine and dextroamphetamine, in their pure amine forms. The term is frequently used informally to refer to any combination of the enantiomers, or to either of them alone. Historically, it has been used to treat nasal congestion and depression.