Avanafil Stendra. Sildenafil Viagra. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider. Some examples of nitrates are nitroglycerin Nitro-Dur, Nitrostat, others , isosorbide mononitrate Monoket and isosorbide dinitrate Bidil. You can take it in a small dose daily or in a larger dose as needed.Medications. ED medicines can be pills, drugs inserted into the tip of the penis, or shots into the penis. The first things doctors usually prescribe to people with erectile dysfunction . It will get the doctor’s attention, and it will help make sure the man will actually bring up the subject. See a sex therapist. The name “sex therapist” may sound intimidating. 1. How it works Sildenafil may be used to treat erectile dysfunction (ED or impotence) in men (Viagra brand) or pulmonary arterial hypertension in both men and women (Revatio .