Yohimbine–Help or Harm?

Q. What’s the scoop on yohimbine for impotence? I’ve read that it has no serious side effects–though it may not work in humans. But I’ve also heard that there may be side effects. What is right?
I have a healthy libido, but I have recurring problems in achieving or maintaining an erection.
A. Most of the clinical research on yohimbine was done before Viagra, Levitra and Cialis became so popular. It was found to be helpful for some men with erectile dysfunction (International Journal of Impotence Research, Feb., 2002). The medicine used in such studies is available by prescription under the brand name Yocon.
Yocon has well-recognized side effects, including elevated blood pressure, nervousness, nausea and vomiting, urinary retention and rapid heart rate. A new analysis of reports to the California Poison Control System noted an increase in problems between 2000 and 2006 (Annals of Pharmacotherapy, June, 2010). The majority of these reports involved herbal products. The most common problems included digestive distress, rapid heartbeat, anxiety and hypertension.
Before taking an herbal yohimbine product, you should discuss your situation with your doctor. This herb is best used under medical supervision.