Levitra (vardenafil) is a prescription oral medicine used to treat male impotence or erectile dysfunction. Take the dosage of Levitra prescribed by your doctor about one hour before having sex to provide for the best result. Do not take a double dose of Levitra and make sure there are at least 24 hours between the two doses. Before asking your doctor for a prescription make sure you mention the fact of having a history of blood clots or stroke, heart attack, angina, congestive heart failure, liver or kidney disease, bleeding disorder, high or low blood pressure, blood cell disorder, heart rhythm problems, any inherited eye problems or stomach ulcer.

Priapism is one of the rare and serious side effects of this medicine. It is described as a long and painful erection that wouldn’t go away. This condition is dangerous because it can permanently damage the tissues of your penis and lead to impotence. Any medicine taken in excess can cause dangerous health consequences. If you think you have taken too much of this drug seek emergency medical assistance. The symptoms of an overdose are not known and can vary from person to person. Do not share your medicine with patients to whom it was not prescribed.