ChantixListen to pronunciation(CHAN-tix)A drug used to help people stop smoking by acting the same way nicotine acts in the brain. It is a type of nicotine receptor partial agonist. Also called varenicline tartrate.More InformationHandling Nicotine Withdrawal and Triggers When You Decide To Quit TobaccoSearch NCI's Dictionary of Cancer TermsStarts withContainsBrowse:ABCDEFGHIJKLMNOPQRSTUVWXYZ#