People taking nitrates like nitroglycerin Nitrostat or isosorbide mononitrate Imdur should not take PDE5 inhibitors, as doing so could result in a dangerous drop in blood pressure. If approved, the provider will issue a prescription. Contact your medical provider if you experience any side effects during treatment. You should also call your insurance company to see if they cover erectile dysfunction medications. Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours. You can see an in-person provider or speak with a doctor virtually. Follow-up support: Make sure you can get the help you need if questions or concerns arise after ordering.Here’s the easiest way to use GoodRx to get Levitra cheaper: Download the GoodRx app on your mobile device. Search for Levitra or vardenafil in the app (or by . Amazon Prime members get additional benefits including FREE 2-Day Delivery and low prices on medications. About this medication. VARDENAFIL (var DEN a fil) treats . You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment. Vardenafil is used to treat .