Minimal side effects: Avanafil has been reported to have a lower incidence of side effects than other PDE5 inhibitors. Some commonly prescribed medications include Viagra, Cialis, and Levitra. It has been on the market for several decades and has established a solid reputation for its effectiveness in treating ED. It is recommended to take sildenafil on an empty stomach for optimal results. If approved, the provider will issue a prescription. A deficiency of testosterone can cause a decrease in libido and sperm count and difficulty in attaining an erection. These include a heart attack, stroke or a serious heart rhythm disorder in the past six months.Price without insurance: starts at $80 per dose. Doses: 25, 50, and milligrams (mg) Supply: 30 or 90 days. To get a prescription for Viagra through the Optum Store, you’ll . Generic Viagra (sildenafil): $4 per 25 mg pill, $6 per 50 mg pill, $10 per mg pill; Branded. Other options. There are several options to treat erectile dysfunction aside from oral medications like Cialis, including: erectile dysfunction pump, which can be a penis or .