出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/01/14 18:07 UTC 版)
A euphoriant (or euphorigenic) is a type of psychoactive drug which tends to induce feelings of euphoria, the effects of which may include relaxation, anxiolysis, stress relief, mood lift, pleasure, and a rush although these effects are not necessary for a drug to be a euphoriant. Many euphoriants are notorious for their problems with abuse, addiction, and dependence. These agents are thought to induce their reinforcing effects by activating the so-called pleasure centers of the brain such as the nucleus accumbens, olfactory tubercle, and ventral tegmental area.