Why is losartan banned in the US?

Written by Editorial Team | Last Updated: August 2026

Losartan medications are not broadly banned or prohibited from use in the United States, but specific commercial batches or production lots manufactured by various generic drug makers have historically faced targeted, voluntary recalls. These specific product pullbacks occurred because routine quality testing detected trace amounts of unexpected nitrosamine impurities, which are classified as potential human carcinogens when consumed above established safety thresholds over long periods. Regulatory agencies mandated these lot-specific recalls to eliminate substandard products from pharmacy shelves, while overall uncontaminated formulations of losartan remain approved and widely prescribed for hypertension management.

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