Buy Levitra online is used to treat erectile dysfunction in men. Levitra does not cure erectile dysfunction or increase sexual desire. This medicine does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus(HIV). Excess use of this medicine may have some effects on the body, such as sudden vision loss, chest pain, and many more, so you cannot take it without your doctor's permission. Take Levitra exactly as prescribed by your doctor. Follow all directions on your prescription label and read all medication guides or instruction sheets. Levitra can be taken with or without food. Levitra is taken only when needed, about 60 minutes before sexual activity. The medicine can help achieve an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Call your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection can damage the penis. Do not take Levitra if you are also using nitrate drugs for chest pain heart problems and many more.