= psychopharmacological, adj.

= psychotropic, adj.

Of a drug (esp. an illicit one): producing an alteration in the mind, esp. an apparent expansion of consciousness through greater awareness of the…

Of, relating to, or designating a psychoactive substance, esp. a drug.

= psychedelic, adj. 1.

(a) adj. designating or relating to psychoactive drugs; (b) n. a psychoactive drug.

Of or relating to psychopharmacology; (of a drug) psychotropic.