But thought I'd share anyway. Many years ago, I had prostate surgery. As often happens, it resulted in impotence. Since then I've suffered through bad side effects of Viagra, Cialis, and all the others. I'd have severe headaches, nasal congestion, and moodiness. I finally went to a different doctor who suggested Trimix injections. I'd heard about injections but discarded the idea. Well, I decided to give it a try and it's been great. Tiny needle- given at the base of the penis. Works within minutes and no side effects. So, if any have had same problems, consider the shots. Well worth it for me!(!)