How to use Viagra (step 5)

Know that, despite their success, erection drugs also have limitations. They are ineffective in about 25 percent of cases. As severity of ED increases, their effectiveness decreases. For example, the drugs work well in many men with the beginnings of diabetic ED, but less well in diabetics with considerable cardiovascular and neurological damage. In men with mild erection balkiness, these drugs may not work in some situations—if a man feels particularly stressed, distracted or alienated from the sexual experience.