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Dietary supplement

Tribulus Ingredients & Drug Interactions

by L.A. Naturals

Tribulus label
See full label image
Liquid Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Tribulus against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Tribulus is a dietary supplement by L.A. Naturals with 1 active ingredient. Its ingredients are commonly taken for low libido and sexual function, athletic performance and muscle building, testosterone support.Based on those ingredients, 259 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are dry Tribulus. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Tribulus by L.A. Naturals

Ask about any prescription or over-the-counter medication and we check it for interactions with Tribulus by L.A. Naturals — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Tribulus by L.A. Naturals

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 1 active ingredient.

This liquid product contains one active ingredient: dry Tribulus. Tribulus is a plant extract that's been studied for sexual function and athletic performance.

The liquid also contains grain alcohol and deionized water as inactive ingredients to deliver the tribulus.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: sexual function and athletic performance.
  • We looked for evidence on: Erectile dysfunction (ED), Sexual dysfunction, Premature ejaculation, Athletic performance, Exercise-induced muscle damage, Male infertility — and 3 related terms.
  • The strongest evidence on file: Tribulus is rated "Possibly Effective" for Sexual dysfunction (Natural Medicines).
  • Also on file: Tribulus is rated "Possibly Ineffective" for Athletic performance.
  • Also on file: Tribulus is rated "Insufficient Reliable Evidence To Rate" for Erectile dysfunction (ED), Premature ejaculation, Male infertility, Exercise-induced muscle damage.

Tribulus has possibly effective evidence for sexual dysfunction — multiple studies suggest it may help, though the evidence isn't definitive. For athletic performance, the evidence points to possibly ineffective, meaning it's unlikely to boost your workout results.

For benign prostatic hyperplasia (BPH, or enlarged prostate), we don't have enough reliable evidence to say whether it works.

The evidence, ingredient by ingredient Tribulus

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Short-term use in healthy adults is generally well tolerated, but we don't have solid long-term safety data. You should avoid tribulus during pregnancy because it may affect hormones and safety hasn't been established.

Avoid it while breastfeeding too, since we don't have reliable information on safety for nursing infants. Gastrointestinal side effects like nausea, cramping, diarrhea, and vomiting can occur, though in one study they happened at similar rates in both tribulus and placebo groups.

Serious effects are rare but have been reported, including liver and kidney injury and seizures; one case involved someone drinking very large amounts of tribulus water daily.

Side effects, ingredient by ingredient Tribulus

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Tribulus.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications; lithium.
  • For scale: 259 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before taking this product, double-check your blood pressure medications (antihypertensive drugs) and blood sugar medications (antidiabetes drugs) — both Moderate-severity interactions. Also verify lithium if you're on it.

All three could be affected by how tribulus works in your body.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

If you're looking into tribulus for sexual dysfunction and don't take blood pressure or blood sugar medication or lithium, talk to your pharmacist about whether it's right for you. Anyone on antihypertensive drugs, antidiabetes drugs, or lithium should check their exact medications with us before starting.

Long-term safety data are limited, so short-term use under guidance is the safer bet.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jul 25, 2014.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Tribulus, straight from the product label.

Brand L.A. Naturals
Barcode (UPC) 641356161214
Net contents 1 fl. Oz.; 30 mL
Market status On market
Date entered into DSLD Jul 25, 2014
DSLD ID 35169
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years), Kosher
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Tribulus by L.A. Naturals, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
0.67 mL
Maximum serving Sizes:
1.33 mL
Servings per container
30
UPC/BARCODE
641356161214
IngredientAmount% DV
dry Tribulus0 NP--

Other ingredients: Grain Alcohol, deionized Water

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions

SUGGESTED USE: 20-40 drops in water or juice, 2-3 times daily, or as needed.

Shake well before using.

General Statements

MADE IN THE USA

FAST ABSORPTION MEDICINAL BOTANICALS

Amount Per Serving 500 mg Herb Weight Equivalence

Herb Strength Ratio 1:2

Plant # K-0001604

Seals/Symbols

L.a.(TM)

K PARVE

Formula

SINGLE HERB IN ALCOHOL

FDA Statement of Identity

DIETARY SUPPLEMENT

Precautions

WARNINGS: Keep out of the reach of children.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Tribulus by L.A. Naturals label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Tribulus label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Tribulus by L.A. Naturals

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size0.67 mL Dosage formLiquid Servings per container30 Amounts shown are per serving.

Dry Tribulus

Interacts with
259 drugs
0 NP per serving

Tribulus is a plant supplement most often marketed to boost libido, testosterone, and athletic performance, but the human evidence behind these claims...

Dry Tribulus monograph & interactions

Other (inactive) ingredients: Grain Alcohol, Deionized Water. These complete the product’s ingredient list but are not active constituents.

Interaction report

Tribulus by L.A. Naturals Drug Interactions

Want to check YOUR meds against Tribulus?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
259Drugs
259 Moderate

Ingredients driving the most interactions

dry Tribulus 259

Individual Drug Interactions

The ingredients in Tribulus interact with 259 drugs. Click any drug to see the details.

1 of the 1 ingredient in Tribulus interact with drugs. Each result below shows which ingredient is responsible. dry Tribulus

Each ingredient & the kinds of drugs it affects

For each ingredient in Tribulus with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

dry Tribulus3 drug types · 259 drugs

Antidiabetes Drugs

Taking tribulus with antidiabetes drugs might increase the risk of hypoglycemia.
Clinical research shows that Tribulus can lower blood glucose levels in adults with type 2 diabetes who are taking antidiabetes medications.

Likelihood Possible Evidence D
Antihypertensive Drugs

Theoretically, taking tribulus with antihypertensive drugs might increase the risk of hypotension.
Animal research shows that tribulus can lower blood pressure by inhibiting angiotensin-converting enzyme (ACE). Tribulus has also demonstrated hypotensive effects in pre-hypertensive adults.

Likelihood Possible Evidence D
Lithium

Theoretically, tribulus might increase the levels and clinical effects of lithium.
Tribulus is thought to have diuretic properties. Due to these potential diuretic effects, tribulus might reduce excretion and increase levels of lithium. The dose of lithium might need to be decreased.

Likelihood Probable Evidence D
dry Tribulus full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Tribulus, from the product label.

L.A. Naturals

See all L.A. Naturals products
Name
Palko Services
Street Address
4991 W. US Hwy 20
City
Michigan City
State
IN
ZipCode
46360
Pharmacist Counseling Corner

Tribulus by L.A. Naturals: Common Questions

Does Tribulus by L.A. Naturals interact with any medications?
Yes. Based on its ingredients, Tribulus has a known interaction with 259 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Tribulus contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take Tribulus if I'm pregnant or breastfeeding?
No. The safety data advise against tribulus during pregnancy because it may affect hormones and safety hasn't been established. Avoid it while breastfeeding too — we don't have reliable safety information for nursing infants. Talk with your doctor about other options.
Does Tribulus actually work for sexual dysfunction?
The evidence says possibly effective — meaning some good studies show it may help, but we can't say for certain. It's one of the better-studied uses for tribulus, but results aren't guaranteed.
What are the common side effects?
Abdominal pain, cramping, nausea, vomiting, diarrhea, and constipation can happen. In one study, though, people taking tribulus reported these complaints at about the same rate as those on placebo, so they may not be caused by the supplement itself.
Is this liquid form safe long-term?
Short-term use in healthy adults is generally well tolerated, but we don't have solid safety data for long-term use. If you're thinking of taking it for weeks or months, check with your pharmacist or doctor first.
Will Tribulus help my athletic performance?
The evidence says possibly ineffective — meaning studies suggest it's unlikely to improve your workout results or strength gains.
What about my blood pressure or diabetes medication?
Tribulus can lower blood pressure and blood sugar on its own. If you're already on medication for either, there's a risk of them dropping too low. Check your exact medications with our tool before you start, and talk to your pharmacist about whether it's safe for you.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if Tribulus is safe with your meds?

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Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Tribulus label
Go deeper

The Full Monographs Behind Tribulus’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Tribulus

Interacts with 259 drugs

Tribulus is a plant supplement most often marketed to boost libido, testosterone, and athletic performance, but the human evidence behind these claims is weak and inconsistent. It is general...

Read the full Tribulus monograph →
Sources

Sources & How We Checked

Tribulus's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 10 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Tribulus 10 references
  1. Sharifi AM, Darabi R, Akbarloo N. Study of antihypertensive mechanism of Tribulus terrestris in 2K1C hypertensive rats: role of tissue ACE activity. Life Sci 2003;73:2963-71. PubMed
  2. Walker D, Bird A, Flora T, O'Sullivan B. Some effects of feeding Tribulus terrestris, Ipomoea lonchophylla and the seed of Abelmoschus ficulneus on fetal development and the outcome of pregnancy in sheep. Reprod Fertil Dev 1992;4:135-44. PubMed
  3. Al-Ali M, Wahbi S, Twaij H, Al-Badr A. Tribulus terrestris: preliminary study of its diuretic and contractile effects and comparison with Zea mays. J Ethnopharmacol 2003;85:257-60. PubMed
  4. Tabakova, P., Dimitrov, M., Ognyanov, K., and et al. Clinical study of Tribestan in females with endocrine sterility. Documentation for Registration (unpublished) 1999.
  5. Akhtari E, Raisi F, Keshavarz M, et al. Tribulus terrestris for treatment of sexual dysfunction in women: randomized double-blind placebo-controlled study. Daru 2014;22:40. PubMed
  6. Ryan M, Lazar I, Nadasdy GM, et al. Acute kidney injury and hyperbilirubinemia in a young male after ingestion of Tribulus terrestris. Clin Nephrol 2015;83(3):177-83. PubMed
  7. Postigo S, Lima SM, Yamada SS, et al. Assessment of the effects of Tribulus terrestris on sexual function of menopausal women. Rev Bras Ginecol Obstet 2016;38(3):140-6. PubMed
  8. Talasaz AH, Abbasi MR, Abkhiz S, Dashti-Khavidaki S. Tribulus terrestris-induced severe nephrotoxicity in a young healthy male. Nephrol Dial Tranplant 2010;25(11):3792-3. PubMed
  9. Samani NB, Jokar A, Soveid M, Heydari M, Mosavat SH. Efficacy of the hydroalcoholic extract of Tribulus terrestris on the serum glucose and lipid profile of women with diabetes mellitus: a double-blind randomized placebo-controlled clinical trial. J Evid
  10. Siddiqui MA, Itrat M, Mobeen A, Khan MI. Efficacy of khar-i-khasak (Tribulus terrestris Linn.) in prehypertension: a randomized, double-blind, placebo-controlled trial. J Complement Integr Med. 2021.

See these in context on the Tribulus monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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