Ejaculatory failure and urinary dysfunction secondary to labetalol.

We describe 3 men with moderate to severe essential hypertension in whom ejaculatory failure developed after therapy with labetalol, an antihypertensive drug with alpha-1 and beta-adrenergic blocking properties. No decrease in libido or erectile dysfunction was reported by any of the patients. Previous and subsequent antihypertensive therapy with either alpha or beta-adrenergic blocking agents failed to cause similar symptoms. These findings reveal a unique spectrum of genitourinary dysfunction associated with the multireceptor blocking properties of labetalol.