Hoodia, an alleged fat-fighting dietary supplement, may produce vomiting, cause tingling skin sensations and elevate blood pressure and heart rate. Hoodia is used primarily as a dietary agent to help people lose weight. It is classified as an herbal extract and is derived from a succulent plant native to tropical regions.
Studies of the health effects of Hoodia are ongoing, but a report from the Health Psychology department of Vanderbilt University reports that users have reported intestinal upset, including nausea and vomiting. This is in addition to claims of neurological sensations, such as skin tingling and a sensation of crawling on the skin surface, and cardiac responses, including elevated blood pressure and heart rates.