Staxyn vardenafil disintegrating tablets should not be used in place of Levitra vardenafil regular tablets. Have blood cell problems such as sickle cell anemia, multiple myeloma, or leukemia. What should I tell my healthcare provider before taking Levitra? Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Have kidney problems and require dialysis. Use Levitra Vardenafil exactly as directed on the label, or as prescribed by your doctor. Do not take more than one Levitra a day.Levitra is not a cure for ED and you still need to be aroused for the medication to work. Levitra and its generic version (vardenafil) are available in doses of: milligrams. 5 milligrams. Find everything you need to know about Levitra (Vardenafil), including what it is used for, warnings, reviews, side effects, and interactions. Learn more about Levitra (Vardenafil) at. Vardenafil (Levitra): Uses, Alternatives, Side Effects & More – GoodRx. feeling faint or weak, dizziness, blurry vision, feeling confused. Erection lasting for more than 4 hours. Headache (up to 15%) Flushing (up to 11%) Stuffy nose (up to 9%) Indigestion (up to 4%) —skin rash,, swelling of the face, lips, tongue, or throat.