Erectile dysfunction, or ED, can be a total inability to achieve erection
, an inconsistent ability to do so, or a tendency to sustain only brief erections
'The etiology of ED is usually multifactorial. Organic, physiologic, endocrine, and psychogenic factors are involved in the ability to obtain and maintain erections. In general, ED is divided into organic and psychogenic impotence, but most men with organic etiologies usually have an associated psychogenic component.