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. Erectile dysfunction can be caused by psychological factors, medical conditions and certain medications. Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours. Common side effects include headache, facial flushing, indigestion, and dizziness. Erectile dysfunction medications require a prescription from a licensed provider. Online ED consultations offer privacy, convenience, and affordability while allowing you to quickly get the medications you need—the same day, with some services. Head to head clinical studies have generally demonstrated that no particular erectile dysfunction medication is superior to the others.Get ED meds online, shipped to you. FDA-approved ED pills. Generics up to 95% cheaper than brand name. % online, discreet delivery. No waiting weeks for an appointment. Get started today. Prescription products available only if prescribed by the healthcare provider after an online consultation. Hims offers Viagra ® and Cialis ®, and their generics which are up to 95% cheaper than brand names.  · Hims charges $99 per minute therapy session, regardless of how often you schedule. There are no subscription fees. If your therapist prescribes medication, there is a $25 charge for your first.