However, the dose is usually not more than 20 mg once per day. Erectile dysfunction care at Mayo Clinic Our caring team of Mayo Clinic experts can help you with your health concerns. This is not a complete list of side effects and others may occur. Use only the brand of this medicine that your doctor prescribed. Are there any brochures or other printed material that I can take home with me? · Adults—10 milligrams (mg) as a single dose, no more than once per day, approximately 1 hour before sexual test1.rug: levitra. Take vardenafil exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. If you are taking the rapidly disintegrating tablet, check the blister pack before you take your first dose. Do not use any of the medication from the pack if any of the blisters are torn, broken, or do not contain tablets.  · Description and Brand Names Drug information provided by: Merative, Micromedex ® US Brand Name Levitra Staxyn Descriptions Vardenafil is used to treat men with erectile dysfunction (sexual impotence). It belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors.