Controlled substances are medications with a potential for abuse or misuse. They are often, also, medications that have powerful effects on brain function. Common controlled substances that doctors prescribe include: Narcotic pain medications (Demerol, Norco, Tyco, etcetera) Stimulant medications (Adderall, Ritalin, Concerta, etcetera) Benzodiazepines and similar sedating and anti-anxiety medications (Xanax, Valium, Ativan, Ambien, etcetera) Testosterone and some other hormone …