Definitions for "Drug addiction"
See Addiction.
an addiction to a drug (especially a narcotic drug)
a chronic relapsing disorder characterized by compulsive, often uncontrollable, drug seeking and drug use in the face of negative consequences
See substance dependence.
Substance dependency. Habituation is used by the World Health Organization (WHO).
the psychological need to use drugs for other than medical reasons, such as pain relief.
It is estimated that there are 1.5 million problem drug users in the EU. (See Drugs coordination, Studies in the drugs coordination area)