Medical consultations were also taken into consideration, as PDE5 inhibitors require a valid prescription from a licensed medical provider. The four main medicines taken by mouth for erectile dysfunction are: Avanafil Stendra. That’s not to say there aren’t just as many illegitimate sites. While each PDE5 inhibitor differs slightly, they’re very similar in treating erectile dysfunction. Some examples of nitrates are nitroglycerin Nitro-Dur, Nitrostat, others , isosorbide mononitrate Monoket and isosorbide dinitrate Bidil. It depends on the platform and insurance provider.The FDA has tips for buying medicines online safely. How can you tell if an online pharmacy is operating legally? The FDA’s BeSafeRx site can help you identify and avoid . Viagra and Cialis are the most popular ED (erectile dysfunction) drugs in the world, but they’re not the only ones. They’re equally safe and effective, but they differ a bit in how . The basic cost of Levitra is approximately: Brand name: $ to $1, for ten to thirty 10 mg tablets. Generic: $ to $ for ten 10 mg tablets. But your out-of-pocket cost for .