It’s available in 25 mg, 50 mg, and mg tablets and lasts up to 18 hours. Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours. Follow all directions on your prescription label and read all medication guides or instruction sheets. Never purchase ED medications from a site or service that doesn’t require a prescription and medical documentation. Generic vs. It’s best to check your chosen provider’s site for more information. Cialis tadalafil : This ED medication works with the same principle as Viagra, but lasts up to 36 hours.Print Save. Levitra Prices, Coupons and Patient Assistance Programs. Levitra (vardenafil) is a member of the impotence agents drug class and is commonly used for Erectile . The basic cost of Levitra is approximately: Brand name: $ to $1, for ten to thirty 10 mg tablets. Generic: $ to $ for ten 10 mg tablets. But your out-of-pocket cost for . Levitra (vardenafil hydrochloride) is an oral medication taken to treat erectile dysfunction (ED). It’s in the same class of drugs as other popular ED medications, including Viagra .