The continued compulsive use of drugs in spite of adverse health or social consequences.
a state of heavy dependence on a drug; sometimes defined as physical dependence but usually also including emotional dependence, ie, compulsive or pathological drug use. It is often used synonymously with substance dependence.
A monopolization of the attentional system by drug-related stimuli. For example, if cocaine addicts see white powder, they will probably experience cravings, because their brain associates white powder with cocaine.
A behavior disorder characterized by drug-seeking behavior and the use of the drugs for that other than medical indications.
an addiction to a drug (especially a narcotic drug)
Drug addiction, or substance dependence is the compulsive use of drugs, to the point where the user has no effective choice but to continue use. ...
