Since vardenafil is used as needed, you are not likely to be on a dosing schedule. Vardenafil is taken only when needed, about 60 minutes before sexual activity. If you think you or someone else may have overdosed on: Levitra Vardenafil , call your doctor or the Poison Control center. Tadalafil is structurally different from both sildenafil and vardenafil. 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. The difference between the vardenafil molecule and sildenafil citrate is a nitrogen atom’s position and the change of sildenafil’s piperazine ring methyl group to an ethyl group. Use the medicine exactly as directed.In combination with sexual stimulation, vardenafil works by increasing blood flow to the penis to help a man get and keep an test1.ru drug does not protect against sexually transmitted. What is this medication? VARDENAFIL (var DEN a fil) treats erectile dysfunction (ED). It works by increasing blood flow to the penis, which helps to maintain an erection. This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions. COMMON BRAND NAME (S): Levitra Advertisement. Vardenafil, sold under the brand name Levitra among others, is a medication that is used for treating erectile dysfunction. It is a PDE5 inhibitor. It is taken by mouth.