Canada Health announced that Pfizer Korea had stopped its global distribution of the drug company's nicotine addiction therapy drug Champix. Pfizer Korea initiated the distribution stoppage to "dispel concerns over the treatment's N-nitroso varenicline impurities." N-nitroso varenicline is considered a carcinogenic … [Read more...] about Pfizer Champix N-nitroso Varenicline Cancer Lawsuits