SAN FRANCISCO (CBS SF) — Over 200 men who took Viagra say the drug increased their risk of developing melanoma. Now they’re suing pharmaceutical giant Pfizer Inc., claiming negligence and failure to warn them of the erectile dysfunction drug’s danger. Lawsuits against Pfizer are being filed almost daily, all claiming almost the exact same thing: that they developed melanoma after taking Viagra. But Pfizer maintains that there is no scientific evidence supporting a cause and effect relationship between the use of Viagra and the development of the deadly skin cancer, melanoma, which has long been linked to increased exposure to ultraviolet radiation. The flood of lawsuits began after the publication of a 2014 study in the Journal of American Medical Association. The study’s authors state that while they did not find that using Viagra, which also goes by its generic name sildenafil citrate, caused melanoma to develop, they found that “Sildenafil use may be associated with an increased risk of developing melanoma.” Dr. Wen-Qing Li, now a professor of dermatology and epidemiology at Brown University, is one of the main authors of the 2014 study. cialis side effects reviews It had been thought the erectile dysfunction drug, Viagra, increased a man’s risk of melanoma - one of the deadliest forms of skin cancer. However new research has discovered it’s not to blame. In the study by New York University (NYU), they found an 11 per cent increased likelihood of developing melanoma in those taking erection medication, but found the drugs themselves aren’t the reason for the increased risk. They concluded that the apparent link was down to those who took drugs to treat erectile dysfunction also happening to be more health conscious, and therefore likely to see a doctor who then might spot other conditions, such as melanoma. Stacy Loeb, a urologist and assistant professor at NYU, said: “Physicians should still screen for melanoma risk, but they do not need to add the use of Viagra and similar drugs to the list of screening criteria specifically."In general, men should continue to be careful about the risk of any kind of skin cancer from excessive sun exposure and use sun protection."In the UK thousands of men are diagnosed each year, and since the 1990s melanoma skin cancer rates have increased by 162 per cent in men, compared to by 89 per cent in women. These new findings publicised in the Journal of the National Cancer Institute follow last year’s decision by the FDA to put Viagra and other erectile dysfunction drugs on its watch list of medications with possible safety issues. This decision came after a 2014 study, published in the Journal of the American Medical Association, which seemed to find a connection between Viagra use and melanoma. Xanax dosage for children Propranolol tablets By Dr. Mercola. More than 35 million men around the world have been prescribed Viagra sildenafil citrate, 1 Pfizer's blockbuster drug used to treat erectile. prednisone vision Use of the phosphodiesterase 5 inhibitor sildenafil Viagra has been linked to an increased risk of melanoma. Dhayade et al. explore the underlying mechanism and. Sildenafil learn about side effects, dosage, special precautions, and more on MedlinePlus , Li et al found that recent and ever use of sildenafil for erectile dysfunction was associated with increased risk of subsequent melanoma, but not squamous cell or basal cell carcinoma. The RAS/RAF/MAPK and ERK kinase/ERK cascade is crucial to melanoma cell proliferation and survival. Sildenafil is a phosphodiesterase (PDE) 5A inhibitor, and recent data indicate that BRAF activation downregulates PDE5A; low PDE5A expression resulting from BRAF activation or sildenafil use increases melanoma invasiveness, raising the possibility of an effect of sildenafil on incident melanoma risk. Study Details The study involved 25,848 men in the Health Professionals’ Follow-up Study who were questioned regarding sildenafil use for erectile dysfunction in 2000. Participants who reported cancer at baseline were excluded. The incidences of melanoma, squamous cell carcinoma, and basal cell carcinoma were obtained biennially from self-reported questionnaires. Diagnosis of melanoma and squamous cell carcinoma were pathologically confirmed. Editors carefully fact-check all Drugwatch content for accuracy and quality. But its active ingredient, sildenafil, more recently has been linked to an increased risk for melanoma, the most dangerous skin cancer. Viagra use has long been linked to vision and hearing problems, as well as possible heart complications. This includes peer-reviewed medical journals, reputable media outlets, government reports, court records and interviews with qualified experts. In 2014, a study published in JAMA Internal Medicine found that sildenafil, more commonly known by its brand name Viagra, may increase a man’s likelihood of developing melanoma by as much as 84 percent, for those who reported using Viagra in the three months prior to the study’s start. The study included a total of nearly 26,000 male participants who were followed by researchers for 10 years. At its conclusion, it was found that men who reported using Viagra some time before the onset of the study were 92 percent more likely to be diagnosed with melanoma than those men who reported having never used the drug. But study co-author Wen-Qing Li said more research is needed prior to concluding that the use of Viagra causes melanoma. Abrar Qureshi said the study’s results merely point to a correlation, or link, between the two. June Robinson of Northwestern University’s Feinberg School of Medicine said doctors treating older men taking Viagra should also be checking them for signs of skin cancer. Sildenafil melanoma Viagra May Boost Risk of Deadly Skin Cancer, Study Finds, Sildenafil Potentiates a cGMP-Dependent Pathway to Promote. Zithromax for dental abscess Sildenafil dosing Prednisone 5mg pack Zithromax tablets 500mg Zoloft and advil In 2000, participants in the Health Professionals' Follow-up Study were questioned regarding sildenafil use for erectile dysfunction. Recent sildenafil use at baseline was significantly associated with an increased risk of subsequent melanoma with a multivariate-adjusted hazard ratio HR of 1.84 95% CI, 1.04-3.22. Sildenafil use and increased risk of incident melanoma in US men a. Sildenafil MedlinePlus Drug Information Not Just Viagra Cialis & Levitra also Linked to Melanoma. New FDA Watch List Possible ED Drug–Melanoma Link and More. A study published in JAMA Internal Medicine in April 2014 found an association between sildenafil and an increased risk for. tamoxifen alternatives A preliminary study indicates the erectile dysfunction drug Viagra sildenafil may increase the risk of developing melanoma, the deadliest form of skin cancer. The study, published in the JAMA Internal Medicine journal, analyzed data from nearly 26,000 men, 6 percent of whom had taken Viagra. Another analysis of published data does not support a causal link between erectile dysfunction drugs and increased melanoma risk. News & Perspective. Sildenafil and Melanoma.