Varenicline (trade name Chantix in the USA and Champix in Canada, Europe and other countries, marketed by Pfizer, usually in the form of varenicline tartrate), is a prescription medication used to treat smoking addiction. Varenicline is a nicotinic receptor partial agonist– it stimulates nicotine receptors more weakly than nicotine itself does. In this respect it is similar to cytisine and different from the nicotinic antagonist, bupropion, and nicotine replacement therapies (NRTs) like nicotine patches and nicotine gum. As a partial agonist it both reduces cravings for and decreases the pleasurable effects of cigarettes and other tobacco products. Through these mechanisms it can assist some patients to quit smoking.
i started smoking cigarettes when I was 13 along with beer and sex with boys. Girls came a year later. Last January I turned 55. I thought when I got out of prison two years ago it was time to quit for real this time so I got some Chantix. Many people don’t tolerate it well making them crazy. I’m lucky; I’m already crazy so it’s all good. After taking it for about a year, I was finally able to quit. That lasted until about three weeks ago when I started again. I went back on Chantix and I haven’t had a cigarette in three days. I’m sleeping, eating, and watching Simon Schama’s 15 part “History of Britain.” I’m going to get really fat just like Scott.