Erectile dysfunction, commonly referred to as ED, is the inability to achieve or maintain an erection suitable for sexual intercourse. Affecting millions of men in the U.S. alone, ED is most common in men 40 to 70 years old.
Erectile dysfunction can cause stress, lack of self-confidence, and the inability to reproduce, all of which can lead to problems in a relationship. Failing to achieve an erection 20% of the time or less is normal and, in most cases, does not require medical attention. However, failure to achieve an erection more than 50% of the time does require medical attention.