| A | B |
|---|
| Drug | a substance other than food intended to affect the structure or function of the body |
| Illicit | not permitted - unlawful |
| Addiction | persistent compulsive use of a substance known by the user to be harmful |
| Psychoactive | affecting the mind or behavior |
| Psychopharmacology | the study of the effect of drugs on the mind and behavior |
| Correlate | either of two things so related that one directly implies or is complementary to the other |
| Antecedent | a preceding event, condition, or cause |
| Longitudinal | involving the repeated observation or examination of a set of subjects over time with respect to one or more study variables |
| Reinforcement | to strengthen by additional assistance, material, or support : make stronger or more pronounced |
| Gateway | a means of entrance |
| Toxic | of, relating to, or caused by a poison |
| Acute | characterized by sharpness or severity |
| Chronic | marked by long duration or frequent recurrence |
