Doctors warn of Viagra risks

Washington - The male anti-impotence drug Viagra may have serious health risks, particularly for men with cardiovascular problems, US physicians say in the New England Journal of Medicine, published yesterday. In a series of letters published in the journal, physicians report that among their patients taking Viagra, several suffered from tachycardia, or abnormally fast heart rate; one had a serious pulmonary haemorrhage, and some women partners developed bladder infections.