If you ever need emergency medical treatment for a heart problem, the health care providers who treat you will need to know when you last took vardenafil. If you are taking the rapidly disintegrating tablet, check the blister pack before you take your first dose. Grapefruit and Seville oranges may interact with vardenafil and cause side effects. Follow all directions on your prescription label and read all medication guides or instruction sheets. How should this medicine be used?LEVITRA is formulated as orange, round, film-coated tablets with “BAYER” cross debossed on one side and “”, “5”, “10”, and “20” on the other side . Vardenafil (Levitra): Uses, Alternatives, Side Effects & More – GoodRx. feeling faint or weak, dizziness, blurry vision, feeling confused. Erection lasting for more . You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment. Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with .