Levitra is used to treat men's erectile dysfunction. Levitra contains many doses like Levitra 60 mg, Levitra 40 mg, Levitra 20mg, Levitra 10 mg, Levitra 5 mg, and Levitra 2.5mg. Vardenafil is also known by the brand name Levitra. Erectile is when a man is unable to get or sustain an erection. It usually happens because the arteries that carry the blood to the penis are too narrow. The blood vessels that supply the penis with blood expand, or dilate, and the vessels that take blood away from the penis contact. The two large chambers in the penis, known as the corpus cavernosa, fill with blood. Taking Vardenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure. Levitra has some side effects. Before using Levitra you can consult your doctor. The main side effects like heart disease, heart attack stroke, congestive heart failure, high or low blood pressure, and many more, so without doctors' permission you can not use it. it may be harmful to us.