It only comes in one dose: 50mg. So in answer to the question: is Sildenafil just a cheaper version of Viagra? An inherited eye disease that affects the retina. This helps blood flow into your penis more easily, and helps you get firmer erections that last for longer. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. Can you buy Viagra over the counter? Patients should always ask their doctors for medical advice about adverse events.Optum Store Sildenafil If you are experiencing the symptoms of erectile dysfunction (ED), you may have considered using Viagra or a similar ED medication as a possible . Compare prices and print coupons for Sildenafil (Generic Revatio and Viagra) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $ Welcome! Extra 15% off $30 sitewide with code SAVE15; Clip your mystery deal! BOGO 50% off select Walgreens health & wellness.