Viagra and Melanoma Skin Cancer

Based on recent research, it appears that there may be a link between Viagra and melanoma skin cancer risk. It is known that melanoma risk is increased in Viagra users, but whether Viagra use is causing this increase is uncertain. One proposed theory for this Viagra-associated increase in melanoma risk is that Viagra affects the same pathways that are affected when melanoma spreads through the body. It has been suggested that Viagra may stimulate these pathways and make metastasis (spreading of cancer) more likely.