Introduction: Yohimbe bark has been used for centuries in some western African nations for sexual enhancement, it has been reported to contain up to 6% total alkaloids, 10-15% which called yohimbine., Currently yohimbe bark extracts are sold in varying alkaloid concentrations, ranging from plain yohimbe bark powder,to yohimbe 4% extract, yohimbe 8%, and up to yohimbe 20%. The higher the concentration of yohimbe extract, the more potent the yohimbe, and the more likely yohimbe side effects will occur. But then again, the higher percentage yohimbe extracts are more effective at a lower dosage. Some companies promote yohimbe for weight loss.

Yohimbine, also known under the names "harveys harvest" quebrachin, aphrodin, corynine, yohimvetol and hydroergotocin,is a purported aphrodisiac. The effects is very impressive.

The NIH states that Yohimbine hydrochloride is the standardized form of yohimbine that is available as a prescription medicine in the United States, and has been shown in human studies to be effective in the treatment of male impotence.