c5a18f9f__Drug_Policy_Reform___Glossary__Definition
[Term] Drug [Definition] 
Any chemical agent that alters the biochemical or physiological processes of tissues or organisms. In this sense, the term drug refers better to any substance which is principally used for its psychoactive effects. Also used to refer to illicit, rather than licit (such as nicotine, alcohol or medicines) substances.
Global Initiative for Drug Policy Reform » Glossary
Definition