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Quit smoking aids nys12/27/2023 ![]() But experts believe it may have similar risks to other nitrosamines. N-nitroso-varenicline is still being investigated to see if there’s any link to cancer. The nitrosamine found in Chantix is called N-nitroso-varenicline, and it’s unique from the more well-known N-nitrosodimethylamine (NDMA) found in ranitidine and several other medications. Currently, there is no evidence to say if nitrosamines are harmful in humans or not. There are reports that when nitrosamine is given to rats, it can cause tumors to grow in multiple organs, including the liver, kidneys, and lungs. This link is still being investigated in humans, but animal studies suggest nitrosamines are carcinogenic (cancer-causing). When large amounts of nitrosamines are consumed for long periods of time, they may raise your risk of cancer. The problem isn’t the chemical itself, but rather how much we consume. We’re all exposed to nitrosamines to some degree, and our bodies even make them while digesting certain foods. Nitrosamines are chemical by-products found in multiple natural sources and foods, such as cured meats, dairy products, and vegetables. What are nitrosamines, and why are they bad for you? While it may still contain nitrosamines, its levels are within acceptable FDA limits. To help alleviate medication shortages, the FDA approved the first generic varenicline in August 2021. Pfizer voluntarily recalled all batches of the medication. The FDA didn’t initiate the recall of Chantix. There is no word if they will resume manufacturing it in the future. Since then, Pfizer seems to have permanently stopped making Chantix. Because of this, Pfizer stopped producing the medication. The amount of the contaminant present was higher than what’s acceptable according to FDA guidelines. But why did this happen, and is it safe to take a generic version of Chantix? Why did Pfizer stop producing Chantix?Īs part of regular safety monitoring, Pfizer discovered the presence of a nitrosamine in batches of Chantix during production. Ranitidine (Zantac), metformin, and losartan (Cozaar) have all run into similar problems in the past. This Chantix recall wasn’t the first time a medication was pulled due to the presence of nitrosamines. But other manufacturers have stepped in with generic versions to help fill this gap. Since then, Pfizer stopped making brand-name Chantix. In the days that followed the announcement, the pause in production turned into a voluntary recall. ![]() The halt of this smoking cessation pill was due to a discovery of higher levels of nitrosamines - possible carcinogens - in Chantix than what’s considered acceptable. At the end of June 2021, pharmaceutical manufacturer Pfizer announced they were stopping the global production of Chantix (varenicline).
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