Ottawa -- Health Canada is warning against using the over-the-counter medication Vigoureux -- an unauthorized product advertised to treat erectile dysfunction.

Officials said the product might pose a health risk because it contains the drug sildenafil, which is not indicated on its label.

Health Canada said people with heart problems, those taking heart medications or those at risk for strokes, among others, might be at an increased risk of serious health effects associated with the use of the product.

Officials said Vigoureux is labeled in French only and might be available at retail outlets across Canada. Health Canada said retailers should remove Vigoureux from their shelves, and consumers should return the product to the place of purchase.

Consumers with questions can contact Health Canada's public inquiries line at 866-225-0709.

Copyright 2008 by United Press International.