By stopping this enzyme, the drug allows better blood flow into the penis, meaning better erections. It’s best to check your chosen provider’s site for more information. You should also call your insurance company to see if they cover erectile dysfunction medications. Is Viagra the best tablet for ED? Cialis tadalafil : This ED medication works with the same principle as Viagra, but lasts up to 36 hours. It changes depending on the dose. Online ED consultations offer privacy, convenience, and affordability while allowing you to quickly get the medications you need—the same day, with some services.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 commitment to product quality and safety monitoring. Buy Viagra Online. Bye ED. For ED, Viagra is the first port of call. It’s been used by millions of men for over 20 years, and works by boosting circulation to the penis. We’re here to help you find the ED treatment you need. Order Viagra online and get your first package in business days. Viagra: essential info. How to take Viagra. 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 more than $50 per.