Research Evidence > Search Glossary

A B C D E F G H IJ K L M N O P Q R S T U V WX YZ
Search For in Clear Search
C
Controlled substances

Psychoactive substances and their precursors whose distribution is forbidden by law or limited to medical and pharmaceutical channels. The substances actually subject to this control differ somewhat between countries. The term is often used to refer to psychoactive drugs and precursors covered by international drug conventions {the 1961 Single Convention on Narcotic Drugs, amended by a 1972 Protocol; the 1971 Convention on Psychotropic Substances: the 1988 Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances). At both international and national levels (as in the 1970 United States Controlled- Substances Act), controlled drugs are commonly classified according to a hierarchy of schedules, reflecting different degrees of restriction of availability.

For information about drug law, see the European Legal Database on Drugs

WHO Lexicon of alcohol and drug terms