Erectile dysfunction (ED) is now recognized as a common problem in men. Several medical problems, including diabetes mellitus, coronary artery disease, hypertension, and hyperlipidemia are known to increase the likelihood of developing ED. Diagnosis depends on an adequate history and physical examination. Several therapies are now available for the treatment of ED. With the advent of the phosphodiesterase type 5 (PDE5) inhibitors, therapy for ED has become more acceptable for many men. Oral therapy is usually the first-line treatment due to the ease of use and the effectiveness of this therapy. For men who do not respond to or have a contraindication to PDE5 therapy, intrapenile injection therapy, intraurethral therapy, and vacuum devices are effective alternatives.