Answer: In short, the drug in Viagra, Sildenafil, dilates blood vessels at the entrance to the penis. For more information, work with a member of our medical team who can order lab tests to look for any critical underlying problems. It’s available in 10 mg and 20 mg tablets. If it is not treated right away, priapism can permanently damage your penis sudden vision loss in one or both eyes. Cialis Tadalafil is a tablet that does the same job but works for up to 36 hours, Stendra Avanafil has a faster average response time of 15 minutes, and Levitra Vardenafil is a more potent drug and is thought to be less likely to cause side effects. Many men want to know how to get prescription ED pills without a doctor or other medical professional. However, others work on a cash-pay basis and don’t partner with insurance companies.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 . Learn More IF YOU CHOOSE BRAND-NAME VIAGRA, MAKE SURE YOU GET THE BRAND NAME Your prescription may have been filled with a generic version instead of brand-name VIAGRA. Follow the steps below to help ensure you receive the brand . 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 treatment. But if you’ve.