Keep from freezing. Although, always ensure you lock your medicine cabinet if you have vulnerable adults or children at home. Follow your doctor’s orders or the directions on the label. What Is Levitra Taken For? Some of the general precautions with Levitra are: Avoid taking with prescribed nitrates Avoid taking with St. If the problem persists beyond a few intermittent occurrences, you can talk to your doctor about getting a prescription.Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, vardenafil w. –20 mg: 25– mg: –20 mg: 50– mg: What is a typical starting dose? 10 mg (5 mg for men over age 65 years) 50 mg: mg: mg. Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, vardenafil w.