They have the same benefits and risks as their brand-name counterparts. Taking generic ED medications is an effective way to save money without sacrificing quality. Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours. This medicine also works best when you take it an hour before sex on an empty stomach. 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. Tadalafil Cialis. Some services offer a subscription option where they’ll send your medications every month at a discount.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 Missing: online shop. 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 . It’s no longer sold under the brand name Levitra, but it’s available as generic tablets and orally disintegrating tablets (ODTs). Common side effects of vardenafil Missing: online shop.