has many reason.
The most important organic causes are cardiovascular disease
and diabetes, neurological problems (for example, trauma from prostatectomy
surgery), hormonal insufficiencies (hypogonadism) and drug side effects.
Psychological impotence is where erection or penetration fails due to thoughts or feelings (psychological reasons) rather than physical impossibility; this is somewhat less frequent but often can be helped.
Besides treating the underlying cause , the first line treatment of erectile dysfunction consists of a trial of PDE5 inhibitor drugs (the first of which was sildenafil or Viagra). In some cases, treatment can involve prostaglandin
tablets in the urethra, injections into the penis, a penile prosthesis
, a penis pump or vascular reconstructive surgery