General Dose Information. For most patients, the recommended starting dose of LEVITRA is 10 mg, taken orally, as needed, approximately 60 minutes before sexual .Food and Drug Administration FDA announced that a warning about possible deafness sudden hearing loss would be added to the drug labels of vardenafil, and other PDE5 inhibitors. Vardenafil also does not have an effect on PDE6, which means that it does not have vision adverse effects. Drinking alcohol can increase certain side effects of vardenafil. If you think you or someone else may have overdosed on: Levitra Vardenafil , call your doctor or the Poison Control center. What should I do if I missed a dose of Levitra 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. A prolonged erection priapism can damage the penis.Vardenafil 4 tablets Blister 20 mg. Vardenafil, sold under the brand name Levitra among others, is a medication that is used for treating erectile dysfunction. [1] [2] It is a PDE5 . 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 . General Dose Information. For most patients, the recommended starting dose of LEVITRA is 10 mg, taken orally, as needed, approximately 60 minutes before sexual .If you receive medical care for heart problems, tell your caregivers when you last took vardenafil. This medicine does not prevent the spread of sexually transmitted diseases such as human immunodeficiency virus HIV. Follow all directions on your prescription label and read all medication guides or instruction sheets. This is not a complete list of side effects and others may occur. Do not use in larger or smaller amounts or for longer than recommended. Common side effects may include: flushing sudden warmth, redness, or tingly feeling ; stuffy nose, sinus pain; upset stomach; or back pain. What should I do if I missed a dose of Levitra Vardenafil?