Controlled Substance Schedules

Schedule I (CI)

• Drugs not used medically

• Not accepted as safe for use under medical supervision

• High abuse potential

• Possession and supply prohibited

• Examples include cannabis, LSD, ecstasy, heroin, and lysergic acid ^{[1, 2, 3, 4, 5, 6, 7, 8]}

Schedule II (CII)

• Accepted medical use

• High abuse potential

• May lead to severe psychological or physical dependence

• Examples include amphetamines, codeine, morphine, methamphetamines, and pentobarbital

Schedule III (CIII)

• Accepted medical use

• Less abuse potential than CII

• May lead to moderate to low physical dependence or high psychological dependence

• Examples include acetaminophen with codeine, anabolic steroids, glutethimide, methyprylon, and naloxone

Schedule IV (CIV)

• Accepted medical use

• Less abuse potential than CIII

• Limited physical and psychological dependence

• Examples include alprazolam, clonazepam, phenobarbital, and diazepam

Schedule V (CV)

• Often available without a prescription

• Less abuse potential than CIV

• May be subject to state and local regulations

• Examples include buprenorphine, Robitussin, pregabalin, and diphenoxylate