This is the inability of sex by the male.
This may be caused by :
- organic causes like multiple sclerosis, and arteriosclerosis.
- Endocrine causes like diabetes mellitus, thyroid disorder and hyperprolactinemia.
- Drugs like antihypertensive (beta-blockers), antidepressants, tranquilizer (phenothiazines),anti-androgens and psychotropic (alcohol,barbiturates and marijuana) drugs.