Contaminated Drugs Heartburn

Packages of Zantac are displayed in a Rite Aid store, Monday, Sept. 30, 2019 in New York. CVS has halted sales of popular heartburn treatment Zantac and the store generic version after warnings by U.S. health regulators. CVS is the latest retailer to pull the heartburn tablets from store shelves. Earlier this month, the U.S. Food and Drug Administration warned consumers about a potentially dangerous contaminant in prescription and over-the-counter versions of Zantac. (AP Photo/Mark Lennihan)

A drugmaker is recalling the popular heartburn drug Zantac over concerns it may contain impurities that might cause cancer. 

Glaxo-Smith-Kline announced the recall as a precaution after the U.S. Food and Drug Administration found "unacceptable" levels of a likely cancer-causing impurity in the drug. 

A number of blood pressure medicines have been recalled in recent months over the same concerns. 

The recall does not include over-the-counter dosages, which are produced by a different company.

It does impact four prescription-only medicines, a syrup, an injection and the 150 and 300 milligram tablets.