Levitra (vardenafil) is a prescription medicine used to stimulate blood flow into the tissues of the penis this way treating erectile dysfunction. The effects of Levitra are based on giving the man more sexual power by the means of stimulating blood flow into the tissue of the penis. Therefore, the effects of Levitra are purely physical. However, it works so well also because the patient has some kind of guarantee he will not fail in bed and performs with more confidence. Take Levitra when needed about 60 minutes before you are going to have sex but not more often than once every 24 hours. For some people Levitra will work faster than in an hour, but just to make sure you enjoy the full effects of this medicine 60 minutes is the recommended time before starting sex activity. Being allergic to vardenafil is a direct contraindication for taking this medicine. Make sure your health care provider knows that you are allergic to any other drugs or products to make sure your treatment is efficient.