A recent study published in The Journal of the American Medical Association found that men who used Viagra were twice as likely to develop melanoma, a potentially fatal type of skin cancer, as those who did not use the drug. Another study of 26,000 men found those who used Viagra had an 84% higher risk of melanoma. Researchers concluded Viagra users had a two-fold increased risk of melanoma, though no link was found between Viagra and other skin cancers. The document encourages those who developed melanoma after taking Viagra to contact an injury attorney group.