Oral ED medicines might not work or might be dangerous if you also take any of the following: Nitrate medicines. This allows the smooth muscles in the penis to relax and fill with blood. Kidney disease that needs to be treated with dialysis. Erectile dysfunction can be caused by a variety of factors , including age, cardiovascular problems, diabetes, and other conditions that affect nerve function or blood flow. We also looked at additional services, such as access to digital pharmacies and home delivery options.Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes muscles . According to price-comparison site test1.ru, generic Revatio will cost you as little as $ per pill, depending on where you fill your prescription. That’s compared with . Lemonaid can prescribe sildenafil (generic Viagra), tadalafil (generic Cialis), and vardenafil (generic Levitra). You can get a prescription online following a quick and easy visit with a member of our clinical team. Then the Lemonaid pharmacy, licensed in all 50 states, will ship your meds directly to your door in discreet packaging.