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A genotoxic carcinogen, N‐nitrosodimethylamine (NDMA), was detected as a synthesis impurity in some valsartan drugs in 2018, and other N‐nitrosamines, such as N‐nitrosodiethylamine (NDEA), were later detected in other sartan products. N‐nitrosamines are pro‐mutagens that can react with DNA following metabolism to produce DNA adducts, such as O6‐alkyl‐guanine. The adducts can result in DNA replication...
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