Levitra (vardenafil) is used for the treatment of male impotence. Erectile dysfunction, or ED, is a more exact term for this condition. Some of the Levitra side effects are serious and should therefore be reported to your health care provider as soon as possible. Tell your health care provider immediately if you experience priapism (prolonged erection), sudden loss of hearing or vision, changes in color vision, dizziness, hives, fainting, trouble breathing, ringing in the ears, rash and hoarseness. Your doctor will probably want to know if you are taking any other medicines to make sure no drug interaction occurs. If you are on something at the moment it's best to provide your doctor with a list of these drugs to make sure you do not forget to mention something.