Levitra (vardenafil) is a potent prescription medication used for the treatment of different erectile dysfunction cases. ED can be caused by a variety of reasons, but Levitra is likely to be efficient for most patients. Stuffy nose, back pain, headache, upset stomach, memory problems are the most commonly experienced mild side effects of Levitra. They do not need to be reported to your health care provider unless they change in intensity or become bothersome. You need to stop taking Levitra if you experience shortness of breath, vision changes, chest pain, irregular heartbeat, seizure, erection lasting for over 4 hours, general ill feeling, ringing in the ears, swelling in the hands or feet and sudden vision loss. If you think you are not benefiting from the treatment, talk to your health care provider to have your dose adjusted.