Congress enacted the Controlled Substances Act in 1970 and established five schedules of controlled substances, known as Schedules I, II, III, IV and V. The schedules are arranged first in terms of abuse potential. Schedule lists are updated and published on an annual basis.
The classification for Schedule II substances and drugs stipulates that the drug has a high potential for abuse. It also states that the drug or substance has a currently accepted medical use in treatment in the United States or a currently accepted medical use with severe restrictions and that abuse of the drug or other substances may lead to severe psychological or physical dependence.
Common examples of Schedule II substances and drugs include amobarbital (Amytal, Tuinal), amphetamine, cocaine, codeine, methadone, methamphetamine, oxycodone (OxyContin, Percocet, Endocet, Roxicodone, Roxicet), meperidine (Demerol, Mepergan, Pethidine), methylphenidate (Concerta, Ritalin, Methylin) and morphine.
For the most complete current listing, check the U.S. Department of Justice, Drug Enforcement Agency website. The substance or drug name appears first, with other names, if any, in parentheses.