Evaluation and treatment of sexual dysfunction in men with diabetes mellitus.

Sexual dysfunction is common among men with Type I and Type II diabetes. Tests of nocturnal penile tumescence (NPT) combined with waking tumescence and questionnaires can more accurately differentiate between primary organic and primary psychogenic impotence. This ability to differentiate the etiology of erectile dysfunction avoids the inappropriate use of penile injections and costly surgical procedures which are unnecessary in treatment of diabetic patients with primary psychogenic impotence. In patients with primary organic impotence, several new treatments are available which result in high patient satisfaction.