Oral ED medicines might not work or might be dangerous if you also take any of the following: Nitrate medicines. Such patients must not apply any out-of-pocket expenses incurred using this Savings Offer toward any government insurance benefit out-of-pocket spending calculations, such as Medicare Part D true out-of-pocket TrOOP costs You are responsible for reporting use of this Savings Offer to any private insurer, health plan, or other third party who pays for or reimburses any part of the prescription filled using this Savings Offer, as may be required. Some people may also have ringing in their ears tinnitus or dizziness. How oral medicines differ Each oral medicine for ED has a slightly different chemical makeup. Tell your doctor or pharmacist if you are taking nitrates medications for chest pain such as isosorbide dinitrate Isordil , isosorbide mononitrate Monoket , and nitroglycerin Nitromist, Nitro-Dur, Nitrostat. You should only be treated with one of these products at a time. Use the oral syringe provided with your medication to measure and take your dose.According to price-comparison site test1.ru, generic Revatio will cost you as little as $ per pill, depending on where you fill your prescription. That’s compared with . 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 . Take sildenafil exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.