Examples of stimulants are dextroamphetamine (Dexedrine, Dextrostat, ProCentra), lisdexamfetamine (Vyvanse), methylphenidate (Concerta, Daytrana, Methylin, Ritalin), and the combination of amphetamine and dextroamphetamine (Adderall). Stimulants were first used to treat asthma and obesity. Today, they're also prescribed to treat problems such as ADHD, ADD, depression, narcolepsy, and other problems.