This condition of diabetic impotence can be treated with oral sildenafil, tadalafil, vardenafil, all of which are a selective type 5 phosphodiesterase inhibitor. It is recommended that during the medication should be effective use of hypoglycemic drugs to effectively control blood sugar. For patients with diabetes mellitus, the persistence of diabetes mellitus tends to destroy the endothelial cells of the penile blood vessels, resulting in three periods of initiation, filling and maintenance of the blood vessels of the penis, which cannot achieve a sustained maintenance of the erectile condition, leading to impotence. Sildenafil and others can effectively improve the erection of the penis and help patients to complete normal sexual intercourse.