Addiction: a behavioral pattern with 2 main characteristics:
1. Compulsive, overwhelming, and chemically-dependent drug-seeking, which in many cases, begins as a desperate attempt to cope with trauma, find social acceptance, relieve pain of any kind, and/or to compensate for a deficiency in brain chemistry.
2. A tendency to experience cravings and temptation, often resulting in extreme discomfort and relapse following withdrawal (due to an imbalance in neurochemistry and diminished reward).