Varenicline (trade name Chantix in the USA and Champix in Canada, Europe and other countries, marketed next to Pfizer, usually in the shape of varenicline tartrate), is a prescription medication euphemistic pre-owned to consider nicotine addiction. Varenicline is a nicotinic receptor unfair agonist¡ªit stimulates nicotine receptors more weakly than nicotine itself does. In this regard it is comparable tocytisine and conflicting from the nicotinic antagonist, bupropion, and nicotine replacement therapies (NRTs) like nicotine patchesand nicotine gum. As a affinity to agonist it both reduces cravings for and decreases the pleasurable effects of cigarettes and other tobacco products. By virtue of these mechanisms it can work for some patients to quit smoking.

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