The anti-smoking drug Chantix has been suspended from distribution in the U.S., and some batches recalled, after heightened levels of a cancer causing chemical were reportedly detected.
The chemical is N-nitrosodimethylamine (NDMA). Chantix's maker, Pfizer, has said the potential risks from excessive levels of NDMA are outweighed by the benefits of Chantix, but the company is recalling some of the batches that could have excessive levels of NDMA while further testing is conducted. The FDA has not recalled Chantix but Canadian health officials have recalled their version of the pill.
Chantix has been on the market for 15 years and it has reportedly been prescribed to 13 million smokers.