TREATMENT FOR SMOKING. TREATMENT FOR SMOKING Champix active molecule : Varenicline is a drug recommended in the framework of tobacco withdrawal. Here, a young mother, wanting to quit smoking, is reading carefully the conditions of use of the drug. Champix active molecule : Varenicline is a drug recommended in the framework of tobacco withdrawal date of authorization of commercialization : September 2006, commercialized in France beginning of 2007. It acts as a partial agonist of nicotinic recept