It changes depending on the dose. So make sure you read the leaflet. Oral ED medicines might not work or might be dangerous if you also take any of the following: Nitrate medicines. The medication was developed by U. That means eating healthy foods, exercising, getting good sleep, limiting stress, and treating other health conditions that might cause ED, like high blood pressure, heart disease, diabetes, obesity, and low testosterone, Dr. But this drug is in no way similar to sildenafil and works in a completely different way.CHOOSE BRAND-NAME VIAGRA The original little blue pill prescribed by doctors for over 20 years Clinically proven to treat men with erectile dysfunction (ED) Ongoing . According to price-comparison site , generic Revatio will cost you as little as $ per pill, depending on where you fill your prescription. That’s compared with . There’s a New Over-the-Counter ED Drug. Should You Be Taking It? Doctors say it could be a “game-changer.” By Erica Sweeney Published: Save Article Image .