bu·pro·pi·on (byōō-prō'pē-ŏn') n. A drug administered orally in the treatment of depression and as an aid in the cessation of tobacco smoking, thought to inhibit neuronal uptake of serotonin, norepinephrine, and dopamine in the central nervous system.
Main Entry: bu·pro·pi·on Pronunciation: byü-'prO-pE-"än, -&n Function: noun : a drug C13H18ClNO usedin the form of its hydrochloride as an antidepressant and as an aid to stop smoking usually without the side effects of depressed libido and weight gain —see WELLBUTRIN, ZYBAN