Schedule I drug

Schedule I encompasses heroin and other drugs with a high potential for abuse and no accepted medical use in the United States. Schedule II drugs, including narcotics such as opium and cocaine and stimulants such as amphetamines, have a high potential for abuse and dependence.…

According to this system, Schedule I drugs are substances with no legitimate medical use. These substances include LSD, heroin, and cannabis. Schedule II drugs, which include cocaine, opium, and morphine, have legitimate medical uses but are considered to have a high potential for abuse.