Viagra, known by the drug name sildenafil, was approved for use by the FDA for treatment of erectile dysfunction in 1998. The first of its kind, Viagra was an instant hit among men. Pfizer quickly come under fire as numerous users suffered heart attacks, strokes, vision, and hearing issues. In 2005 the FDA mandated that Pfizer add warnings for potential vision loss to the label.

Nearly ten years later and the drug is under speculation again. In June 2014, a study published in the Journal of American Medical Association Internal Medicine showed 84% of men who took Viagra® have an increased risk of developing melanoma cancer. The researchers found that when compared to men not using the drug, men with a history of Viagra use were twice as likely to develop melanoma. While this research clearly exists, the drug still remains unlabeled against potential skin cancer development.

Melanoma symptoms are characterized by

• New spots on the skin.
• Change in the size or color of an existing mole.
• Sores that do not heal.
• Changes in texture, oozing or bleeding from a mole.