Fixed drug eruptions on male genitalia: clinical and etiologic study.

Fixed drug eruptions exclusively involving the genitalia of 60 male patients were investigated. Forty-two of the 60 patients completed tests designed to identify the causative drug. Tetracycline, aspirin, metamizole, and trimethoprim-sulfamethoxazole were found to be common etiologic agents. The sites affected were the glans penis, coronal sulcus, and preputial skin. Superficial ulceration or pigmented areas surrounded by an erythematous halo were the main clinical findings at the time of presentation.