bupropion
noun
bu·pro·pi·on
| \ byü-ˈprō-pē-ˌän, -ən
\
\
Medical Definition of bupropion
: a drug administered in the form of its hydrochloride C13H18ClNO·HCl as an antidepressant and as an aid to stop smoking usually without the side effects of depressed libido and weight gain — see wellbutrin, zyban