Vardenafil usually works for 4 to 5 hours. Make sure to get an estimate of when you can expect your prescription in the mail. These medicines are called PDE5 inhibitors. Some platforms have a digital pharmacy that ships the medication to your home, while others send an electronic prescription to your local pharmacy. If approved, the provider will issue a prescription. In some cases, online ED providers accept health insurance. Severe liver disease.Sildenafil, sold under the brand name Viagra, among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. It is also sometimes used off . According to The Associated Press, Reginald Kincer stands accused of purchasing $1, worth of generic Viagra which was then shipped through interstate commerce, making it . on October 30, Aerobic exercise is nearly as effective at addressing erectile dysfunction (ED) as medications such as Viagra, and is safe and less expensive, .