
Pfizer is expanding the recall of its anti-smoking drug Chantix (varenicline), the company announced Friday. The nationwide recall of all Chantix 0.5 mg and 1 mg tablets was prompted because they may contain levels of a nitrosamine, N-nitroso-varenicline, that are at or above levels approved by the U.S. Food and Drug Administration. Long-term ingestion of… read on > read on >