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Pfizer is voluntarily recalling some antihypertensive medications because of unacceptable levels of a potential carcinogen, the company announced. The affected products are quinapril HCI/hydrochlorothiazide (Accuretic) tablets that Pfizer distributes, and two authorized generics, quinapril plus hydrochlorothiazide and quinapril HCI/hydrochlorothiazide, distributed by Greenstone. The drugs have been withdrawn because of the presence of nitrosamine, N-nitroso-quinapril. "Although long-term ingestion of N-nitroso-quinapril may be associated with a potential increased cancer risk in humans, there is no immediate risk to patients taking this medication," Pfizer said in a news release. The tablets are indicated for the treatment of hypertension. Patients currently taking the products are asked to consult with their doctor about alternative treatment options. To date, there have been no reports of adverse events related to the recall, the company said. In all, Pfizer is recalling six lots of Accuretic tablets (two at 10 mg/12.5 mg, three at 20 mg/12.5 mg, and one at 20 mg/25 mg), one lot of quinapril plus hydrochlorothiazide 20-mg/25-mg tablets, and four lots of quinapril HCl/ hydrochlorothiazide tablets (three at 20 mg/12.5 mg and one at 20 mg/25 mg) The recalled tablets were sold in 90-count bottles distributed in the United States and Puerto Rico between November 2019 and March 2022. Product codes and lot numbers of the recalled medications are listed on the Pfizer website. Patients who are taking this product should consult with their health care provider or pharmacy to determine if they have the affected product. Those with the affected tablets should contact claims management firm Sedgwick by phone at 888-843-0247 Monday through Friday from 8 a.m. to 5 p.m. ET for instructions on how to return their product and obtain reimbursement. Health care providers with medical questions regarding the recall can contact Pfizer by telephone at 800-438-1985, option 3, Monday through Friday 8 a.m. to 9 p.m. ET. Providers should report adverse reactions or quality problems they experience using these tablets to Pfizer either by telephone at 800-438-1985, option 1, by regular mail or by fax, or to the Food and Drug Administration's MedWatch program. Return to the ACH Newsroom