Schedule I — drugs with a high abuse risk. These drugs have NO safe, accepted medical use in the United States. Some examples are heroin, marijuana, LSD, PCP, and crack cocaine.
Schedule II — drugs with a high abuse risk, but also have safe and accepted medical uses in the United States. These drugs can cause severe psychological or physical dependence. Schedule II drugs include certain narcotic, stimulant, and depressant drugs. Some examples are morphine, cocaine, oxycodone (Percodan®), methylphenidate (Ritalin®), and dextroamphetamine (Dexedrine®).
Schedule III, IV, or V — drugs with an abuse risk less than Schedule II. These drugs also have safe and accepted medical uses in the United States. Schedule III, IV, or V drugs include those containing smaller amounts of certain narcotic and non-narcotic drugs, anti-anxiety drugs, tranquilizers, sedatives, stimulants, and non-narcotic analgesics. Some examples are acetaminophen with codeine (Tylenol® No.3), paregoric, hydrocodone with acetaminophen (Vicodin®), diazepam (Valium®), alprazolam (Xanax®), propoxyphene (Darvon®), and pentazocine (Talwin®).
