Erectile dysfunction or impotence is a sexual dysfunction characterized by the inability to develop or maintain an erection of the penis for satisfactory sexual intercourse regardless of the capability of ejaculation. There are various underlying causes, such as diabetes, many of which are medically reversible. The causes may be physiological or psychological. Psychological impotence can often be helped by almost anything that the patient believes in; there is a very strong placebo effect. ...
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Prevention
... Although most men experience episodes of erectile dysfunction from time to time, you can take these steps to decrease the likelihood of occurrences: Limit or avoid the use of alcohol and other similar...
Source: MayoClinic