Stop using vardenafil and get emergency medical help if you have: heart attack symptoms–chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating; vision changes or sudden vision loss; or erection is painful or lasts longer than 4 hours prolonged erection can damage the penis. Payment options: Consider how you’d like to pay. Do not use in larger or smaller amounts or for longer than recommended. Your primary care doctor should always know what medications you’re taking, including ED pills prescribed by another provider. What Are the Symptoms of Erectile Dysfunction?Levitra takes about 30 minutes to start working and the effects last a little longer than Viagra, about 5 hours. Staxyn dissolves in your mouth. It contains the same active ingredient as Levitra. Compare prices and print coupons for Viagra (Sildenafil) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $ Check prices. You’ve likely heard of Viagra, Cialis, vardenafil (previously sold as Staxyn and Levitra), and Stendra. These are commonly prescribed treatments for erectile dysfunction (ED) — when a person has regular difficulties getting or maintaining enough of an erection for satisfying sexual intercourse.