About four percent of participants had RLS (944 of 23,119 men), and about 41 percent (9,433 men) had erectile dysfunction. Men with RLS were older and were more likely to be Caucasian. The prevalence of erectile dysfunction also increased with age. Alcohol and Erectile Dysfunction best drugstore where you can buy viagra viagra without prescription If you need viagra now viagra for sale online usa This is another test of nerve function in the shaft of the penis. This test uses electromagnetic vibration to evaluate sensitivity. A decreased perception of vibration may indicate nerve damage in the pelvic area, which can lead to impotence. May require a tension ring or penile tourniquet for best results Douglas K. Owens, MD, MS;