c5a18f9f__Drug_Policy_Reform___Glossary__Definition
[Term] Addiction [Definition] 
General term referring to the concept of tolerance and dependency. According to WHO addiction is the repeated use of a psychoactive substance to the extent that the user is periodically or chronically intoxicated, shows a compulsion to take the preferred substance, has great difficulty in voluntarily ceasing or modifying substance use, and exhibits determination to obtain the substance by almost any means.
Global Initiative for Drug Policy Reform » Glossary
Definition