Additional ranitidine drugs are being recalled by four companies: Apotex Inc., Pro Doc Limitée, Sanis Health Inc., and Sivem Pharmaceuticals ULC. The lots are being recalled as they may have been manufactured using an active pharmaceutical ingredient containing an impurity, N-nitrosodimethylamine (NDMA), above acceptable levels. Please refer to the Affected Products table on Health Canada's website for detailed information on the recalled lots.