Still, it can be dangerous — even life-threatening — if you have existing heart-related concerns. Additionally, sildenafil can interact with drugs called nitrates, which are commonly ...

FDA issues urgent warning about dangerous ingredients found in common sexual enhancement supplements sold in stores and ...

There have been few studies of sildenafil in renal-allograft recipients with erectile dysfunction, and the studies that have been conducted were not double-blinded or placebo-controlled.