A suitable time interval following LEVITRA dosing for the safe administration of nitrates or nitric oxide donors has not been determined. Medicines that block an enzyme called CYP3A4. You have a history of sudden bleeding episodes from your nose before or after starting Levitra 10 mg tablet. It is not advised for females to consume Levitra 10 mg tablet. It can be taken with or without food.The typical starting dose is 10 mg by mouth about 1 hour before sexual activity. Your provider will adjust your dose based on your response. The maximum dose is 20 mg. Vardenafil shouldn’t be taken more than once a day at any dose. 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. 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 sexual stimulation, vardenafil w.