Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Font Size

Tribulus Terrestris

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.

Recommended Related to Vitamins & Supplements

Activated Charcoal

Activated charcoal is sometimes used to help treat a drug overdose or a poisoning. When you take activated charcoal, drugs and toxins can bind to it. This helps rid the body of unwanted substances. Charcoal is made from coal, wood, or other substances. It becomes "activated charcoal" when high temperatures combine with a gas or activating agent to expand its surface area.

Read the Activated Charcoal article > >

Why do people take tribulus?

Over the years, people have taken tribulus in an attempt to enhance athletic performance and for a wide range of health issues that may include heart and circulatory conditions and sexual issues.

But does it work? Limited studies show it might be helpful in lessening symptoms of angina and in enhancing athletic performance. There have also been some studies that show some benefit to people with certain sexual problems and to those suffering from infertility.

Evidence is lacking that shows benefits of tribulus for other health conditions.

With a lack of research to draw on, it's not clear what a safe dosage is. Also, quality and active ingredients in supplements may vary widely from maker to maker. This makes it difficult to set a standard dose. However, one standardized extract is used at a dose of 85-250 milligrams daily.

Can you get tribulus naturally from foods?

No. In fact it is unsafe to eat the spine-covered fruit. There have been reports showing that eating it may cause collapsed lungs.

What are the risks of taking tribulus?

Side effects. Taking tribulus as a supplement for a short time is probably safe, provided that you're healthy and you are not pregnant or breastfeeding. Side effects can include trouble sleeping and irregular periods.

Risks. Lab tests on animals link tribulus to problems in fetal development. So stay away from tribulus if you are pregnant or breastfeeding.

Also, men should be aware that there are some concerns about possible links between tribulus and prostate problems.

Interactions. There don't appear to be any interactions between tribulus and foods or other herbs and supplements.

But tribulus may interact with certain medications. It may increase the effect of certain heart and blood pressure medicines, such as:

If you are taking diabetes medications, tribulus might decrease your blood sugars to dangerously low levels. It may also increase the effect that steroids have on your body.

Vitamins and
Lifestyle Guide

Which Nutrients
Are You Missing?

Learn More

Today on WebMD

vitamin rich groceries
Do you know your vitamin ABCs?
St Johns wart
Ease hot flashes and other symptoms.
Are you getting enough?
Take your medication
Wonder pill or overkill?
fruits and vegetables
Woman sleeping
Woman staring into space with coffee

Send yourself a link to download the app.

Loading ...

Please wait...

This feature is temporarily unavailable. Please try again later.


Now check your email account on your mobile phone to download your new app.