Impotence is the former name for "erectile dysfunction (ED)." In 1992, after discussions with relevant experts, the National Institute of Health decided to replace the word impotence with the term erectile dysfunction. Erectile Dysfunction (ED) refers to the last three months, the penis continued to fail to achieve and maintain adequate erection for satisfactory sexual intercourse; ED is one of the most common male sexual dysfunction, although ED is not a life-threatening disease , But it is closely related to the patient's quality of life, sexual partners and family stability. It is also an early warning signal for many somatic diseases.
