A drug is defined as any psychoactive
substance capable of modifying psychological and/or physiological functions of an individual, including humor, thought
, behavior or emotion. A drug may engender a psychological or physical dependence. Different criteria used to classify a drug are its therapeutic properties, the dependence it causes, and its effects on the central nervous system. It is the legal classification that determines whether a drug is licit or illicit.
Original article published by
. Translated by Jeff
Latest update on November 19, 2013 at 10:40 AM by Jeff.