title: Impotence in older men.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D064420:Drug-Related Side Effects and Adverse Reactions; D007172:Erectile Dysfunction / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D006801:Humans; D007006:Hypogonadism / Q000150:complications; D008297:Male; D010208:Papaverine / Q000627:therapeutic use; D010431:Pentoxifylline / Q000627:therapeutic use; D019736:Prostheses and Implants; D011602:Psychophysiologic Disorders / Q000150:complications; D014652:Vascular Diseases / Q000150:complications
chemical_list: D010208:Papaverine; D010431:Pentoxifylline