Some platforms have a digital pharmacy that ships the medication to your home, while others send an electronic prescription to your local pharmacy. A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow. Online ED consultations offer privacy, convenience, and affordability while allowing you to quickly get the medications you need—the same day, with some services. Most erectile dysfunction medications belong to the drug class known as PDE5 inhibitors , which help relax the muscles and increase blood flow to allow for a full erection. Medical consultations were also taken into consideration, as PDE5 inhibitors require a valid prescription from a licensed medical provider. You can take this medicine with or without food 30 minutes before sex, depending on the dose. This medicine works best when you take it on an empty stomach an hour before sex.Viagra generic form. Viagra is a brand-name medication. Your doctor will recommend the dosage of Viagra that’s best for you. For more information about . Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum . Oral medicines for ED usually work well and cause few side effects. The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil .