Erectile dysfunction is diagnosed when a man has difficulty attaining and sustaining an erection sufficient for sexual intercourse. Prescription medications are the first line of treatment. All of the drugs need to be taken about an hour before activity, on an empty stomach. Some drugs may work in half an hour or less. Excessive alcohol use may reduce the effect of the drug.
To continue reading this article, you must login
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.