A new study links Viagra to an increased risk of the deadly skin cancer melanoma in men who use the erectile dysfunction medication. The study of nearly 26,000 men with an average age of 65 showed that Viagra users were 84 percent more likely – almost twice as likely -- to develop melanoma. The increased melanoma rate among Viagra users occurred even when the findings were adjusted to take into account variables such as family history of skin cancer and exposure to the sun. Each year, almost 10,000 people die of melanomoa, with two-thirds of them men. The Viagra study was published in the Journal of the American Medical Association Internal Medicine. Get more information about Viagra and melanoma.