Pfizer is Recalling Chantix Due to N-Nitroso-Varenicline Contamination Cancer Risk According to the FDA and an online news report posted on lynnwoodtimes.com, Pfizer is recalling all lots of Chantix 0.5 mg and 1 mg tablets at the consumer/patient level because of possible nitrosamine, N-nitroso-varenicline contamination. The … [Read more...] about Chantix Cancer Lawsuits