If you have been searching for sildenafil vs Viagra, you may wonder whether they are actually the same medicine. The short answer is that Viagra is a brand name, while sildenafil is the active ingredient found in Viagra. Both are used to treat erectile dysfunction (ED) and work in a similar way. What Is Sildenafil? Sildenafil is a medicine that belongs to a group called PDE5 inhibitors. It...