Second Toxin Found in Common Heart Drug

Possible carcinogen discovered in Chinese product

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European and North American regulators have found a second toxin that may cause cancer in humans in a commonly used blood pressure drug made by Chinese firm Zhejiang Huahai Pharmaceutical Co Ltd.

Health regulators in the European Union, United States and Canada had already recalled drugs made with the company’s active pharmaceutical ingredient valsartan after finding traces of the chemical N-nitrosodimethylamine (NDMA), considered a potential human carcinogen, in the medicine.

On Thursday, the European Medicines Agency (EMA) said a different chemical, N-nitrosodiethylamine (NDEA), had been detected in products produced before 2012. The U.S. Food and Drug Administration (FDA) also said it had detected the chemical in the recalled drug.

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