The only alternatives to Viagra consist of medications which need to be injected directly into the shaft of the penis in order to improve blood flow, or complex surgery to fit penis pumps or prosthetic implants. This site is intended only for U. It lasts 4 to 5 hours, or longer if you have mild to moderate ED. This boosts blood flow and helps you get an erection from sexual activity. Some people may also have ringing in their ears tinnitus or dizziness. An inherited eye disease that affects the retina. Data shared with Viatris will be aggregated and de-identified; it will be combined with data related to other Savings Offer redemptions and will not identify you Viatris reserves the right to rescind, revoke, or amend this Savings Offer without notice No membership fees.Viagra basics. The active drug in Viagra is sildenafil. It belongs to a group of drugs called phosphodiesterase-5 inhibitors. Viagra comes as tablets you take by mouth. Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes . 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 .