An inherited eye disease that affects the retina. PDE5 is responsible for the problematic blood circulation, leading to inadequate erections or even total impotence. Avanafil Stendra. Some examples of nitrates are nitroglycerin Nitro-Dur, Nitrostat, others , isosorbide mononitrate Monoket and isosorbide dinitrate Bidil. The four main medicines taken by mouth for erectile dysfunction are: Avanafil Stendra. Involve your sexual partner. If medication is prescribed, is there a generic alternative?Yes, penile pumps (also known as ED pumps) are over-the-counter devices that work to treat erectile dysfunction (), similar to Viagra. Viagra is usually the first-line therapy for erectile dysfunction in the United States and is available only on prescription. Although Viagra is the most effective medication for men with ED, some may not want to . Following an extensive research, the 5 best natural dietary supplements (Non Prescription) against erectile dysfunction were identified. This list includes the 5 most effective, safest, popular ED pills at an affordable price (compared to effective power). Oral erectile dysfunction medications are not aphrodisiacs, will not cause excitement and are not needed in people who get normal erections. The medications vary in dosage, how long they work and side effects. Possible side effects include flushing, nasal congestion, headache, visual changes, backache and stomach upset.