(n): (medicine) something that treats or prevents or alleviates the symptoms of disease
(n): a drug that is taken for nonmedicinal reasons (usually for mind-altering effects); drug abuse can lead to physical and mental damage and (with some substances) dependence and addiction
(adj): tending to soothe or tranquilize
(adj): vs. stimulative) -- (capable of depressing physiological or psychological activity or response by a chemical agent
