Erectile Dysfunction affects approximately from 18 to 30 million American men

Revitalizing Psychiatry for North Jersey Mental Health: "Erectile dysfunction is a common sexual complaint in men, which has become the focus of intense public and professional attention since the approval of Viagra and recently Levitra. In the Massachusetts Male Aging Study, a community-based survey of men between the ages of 40 and 70 years, 52% of respondents reported some degree of erectile difficulty."