The popular heartburn drug Ranitidine is being recalled by Health Canada.

A recent study found traces of N-nitrosodimethylamine (NDMA) inside the drug. NDMA is classified as a probable human carcinogen (a substance that could cause cancer) on the basis of animal studies. 

While NDMA is found in water and foods, it is said to not be harmful to people unless ingested in large quantities.

"Nothing has been recalled in terms of buying it over the counter." Co-op Pharmacy Manager, Ian Fleck says. "You can still come and get it over the counter. The problem is that prescription manufacturers have recalled it. So when you used to get a prescription you can't do that anymore."

The companies that have recalled the drug are; Apotex Inc., Pro Doc Limitée, Sanis Health Inc., and Sivem Pharmaceuticals ULC. 

Health Canada says that you can still consume the drug, but to be careful with the quantity that is used.