Tribulus terrestris is a fruit-producing Mediterranean plant that's covered with spines. It is also called puncture vine.
People use the fruit, leaf, or root of the tribulus plant as medicine. Some formulations also include other ingredients.
Always tell your doctor about any supplements you are taking, including natural ones and those bought without a prescription. That way, your doctor can check on any potential side effects or interactions with any medications.
The U.S. Food and Drug Administration (FDA) does regulate dietary supplements; however, it treats them like foods rather than medications. Unlike drug manufacturers, the makers of supplements don’t have to show their products are safe or effective before selling them on the market.