Metformin the Latest in NDMA Tainted Drugs
Diabetes drug found to contain potential carcinogen.
Friday, March 6, 2020 - Online pharmacy Valisure has once again uncovered cancer-causing agent NDMA in a medication -- this time in metformin, the fourth most popular prescribed drug in the U.S. Valisure has submitted a citizen's petition requesting that the FDA recall the contaminated drugs, which have already been recalled in Singapore and Canada.
The company tested 38 batches of the diabetes drug manufactured by 22 companies. Sixteen of those batches, made by 11 different companies, contained NDMA levels greater than the 96 nanograms deemed to be safe for daily intake. Some batches measured NDMA more than 10 times the acceptable level.
Valisure also noted that levels of NDMA varied greatly by batch, punctuating the importance of batch-level testing and better quality assurance for medications.
FDA testing of metformin did not reveal excessively high levels of NDMA.
NDMA, or N-Nitrosodimethylamine, is a type of chemical called a nitrosamine. Low levels of nitrosamines, including NDMA, can be found in diary products, vegetables, and grilled or cured meats. Since the 1960s, NDMA and other nitrosamines have held growing interest for the scientific community, and the International Agency for Research on Cancer has classified them as a Group 2A chemical compound, "probably carcinogenic to humans."
Recently, other medications, including valsartan, losartan, and ranitidine, have been recalled due to high levels of NDMA found in them. Valisure has been at the center of some of these recalls as well, uncovering potential contamination and bringing it to the attention of the FDA.
The FDA has not responded publicly to the Valisure report on metformin.
If you have taken metformin, valsartan, losartan, or ranitidine and have been diagnosed with cancer, contact 1-800-RxWatch for a free, no obligation consultation.
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