A generic version of popular heartburn medication is being recalled because it contains a probable carcinogen.

Drug manufacturer Apotex said it's recalling the 75 mg and 150 mg does of the ranitidine tablets sold at Walgreens, Walmart and Rite Aid pharmacies because the drugs might contain low levels of the cancer-causing impurity NDMA.

The over-the-counter medication is sold as Wal-Zan at Walgreens; at Walmart and Rire Aid, it's described as ranitidine tablets.

Apotex has learned from the U.S. Food and Drug Administration that some ranitidine medicines including brand and generic formulations of ranitidine (regardless of the manufacturer) contain a nitrosamine impurity called N-nitrosodimethylamine (NDMA) at low levels.

Apotex says they have not received any reports of adverse events related to use of the product. The affected Ranitidine Hydrochloride Tablets can be identified by NDC numbers stated on the product label.

Product Strength Pack Size NDC Number
Ranitidine tablets, USP 150mg- acid reducer (Rite Aid) 150 mg 50's Bottle 11822-6052-1
Ranitidine tablets, USP 150mg- acid reducer (Rite Aid) 150 mg 65's Bottle 11822-6052-2
Ranitidine tablets, USP 150mg- acid reducer (Rite Aid) 150 mg 95's Bottle 11822-4727-3
Ranitidine tablets, USP 150mg- acid reducer (Walmart) 150 mg 65's Bottle 49035-117-06
Ranitidine tablets, USP 150mg- acid reducer (Walmart) 150 mg 24's Bottle 49035-100-00
Wal-Zan® 150 RANITIDINE TABLETS, USP 150 mg / ACID REDUCER (WALGREENS) 150 mg 200's Bottle 0363-1030-07
Product Strength Pack Size NDC Number
Ranitidine tablets, USP 150 mg - acid reducer (Rite Aid) 150 mg 24's Bottle 11822-6051-8
Ranitidine tablets, USP 150mg- acid reducer (Walmart) 150 mg 130's Bottle 49035-100-07
Wal-Zan® 150 RANITIDINE TABLETS, USP 150 mg / ACID REDUCER (WALGREENS) 150 mg 24's Bottle 0363-1013-02
Wal-Zan® 75 RANITIDINE TABLETS, USP 75 mg / ACID REDUCER (WALGREENS) 75 mg 30's Bottle 0363-1029-03
Cool mint Ranitidine tablets, USP 150 mg - acid reducer (Rite Aid) 150 mg 24's Bottle 11822-6107-4
Wal-Zan® 150 RANITIDINE TABLETS, USP 150 mg / ACID REDUCER (WALGREENS) 150 mg 65's Bottle 0363-1030-06
Wal-Zan® 150 RANITIDINE TABLETS, USP 150 mg / ACID REDUCER (WALGREENS) 150 mg 95's Bottle 0363-1030-09