Treating Erectile Dysfunction While erectile dysfunction ED can affect all men, there are now many different medical and non-medical options out there to treat it — from exercise to surgical intervention. This medication is taken with or without food an hour before sex. These include a heart attack, stroke or a serious heart rhythm disorder in the past six months. However, the dosage can range from 25— mg. Is 20mg of Cialis better than mg of Viagra? It works for up to 36 hours. Phosphodiesterase type 5 PDE5 inhibitors.Drug Images What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug that’s used in adult . Avanafil (Stendra). Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body . tadalafil (Cialis) vardenafil (Levitra) avanafil (Stendra) About 30 million men in the United States occasionally have a problem with getting or keeping an erection, .