Drug Impurity Woes Worsen as Lupin Recalls Some Pills in U.S.

A unit of Indian drugmaker, Lupin Ltd., issued a voluntary U.S.-wide recall for some batches of two blood pressure pills over concerns about potentially carcinogenic impurities.

Lupin Pharmaceuticals Inc. issued a recall for Irbesartan tablets and Irbesartan and Hydrochlorothiazide tablets after its analysis revealed that some batches of these drugs had more than permitted levels of N-nitrosoirbesartan, a probable carcinogen, the company said in a statement to exchanges.