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Dietary supplement

Tribulus 45 Ingredients & Drug Interactions

by AFI America's Finest

Tribulus 45 label
See full label image
Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Tribulus 45 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 45 is a dietary supplement by AFI America's Finest 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 Tribulus terrestris aerial parts extract. 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 45 by AFI America's Finest

Ask about any prescription or over-the-counter medication and we check it for interactions with Tribulus 45 by AFI America's Finest — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Tribulus 45 by AFI America's Finest

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 Sep 17, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

Tribulus 45 contains one active ingredient: tribulus terrestris aerial parts extract. This is a plant extract from the stems, leaves, and flowers of the tribulus plant, traditionally used for sexual function and athletic performance.

The capsules also contain inactive ingredients — rice flour, magnesium stearate, and silicon dioxide — which are fillers and processing aids.

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: increase sexual desire, muscle mass and energy.
  • We looked for evidence on: Athletic performance, Exercise-induced muscle damage, Erectile dysfunction (ED), Sexual dysfunction, Libido, Testosterone support.
  • 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), Exercise-induced muscle damage.

Tribulus is possibly effective for sexual dysfunction in adults, based on the clinical evidence we have. For athletic performance, the evidence suggests it's possibly ineffective — meaning the data don't support a real benefit.

For benign prostatic hyperplasia (enlarged prostate), we don't have enough reliable evidence to rate how well 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.

Tribulus is generally well tolerated in the short term for healthy adults, though long-term safety data are limited and quality varies across products. Gastrointestinal complaints like cramping, nausea, and diarrhea can occur, though in one study these rates matched placebo.

Serious effects are rare but have been reported: liver and kidney injury, seizures, and painful erection with sexual dysfunction. Avoid this product during pregnancy — the safety data advise against it because it may affect hormones.

Also avoid it while breastfeeding due to lack of reliable safety information.

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.

Double-check this product if you take blood pressure medications, diabetes medications, or lithium. Tribulus can lower blood pressure and blood sugar on its own and may affect how your body handles lithium — all Moderate-severity interactions that may require a dose change or closer monitoring.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Tribulus may help with sexual dysfunction if that's your concern, but it's not proven for athletic performance. The main caution is checking it against blood pressure meds, diabetes drugs, and lithium before you take it — if you're on any of those, talk with your doctor or pharmacist first.

Short-term use in healthy adults is generally tolerated, but long-term safety is less clear.

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 Nov 21, 2016.

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 45, straight from the product label.

Brand AFI America's Finest
Barcode (UPC) 767382033117
Net contents 60 Capsule(s)
Market status On market
Date entered into DSLD Nov 21, 2016
DSLD ID 67219
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
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 45 by AFI America's Finest, 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:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
60
UPC/BARCODE
767382033117
IngredientAmount% DV
Tribulus terrestris aerial parts extract550 mg--

Other ingredients: Rice Flour, Magnesium Stearate, Silicon Dioxide

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.
General Statements

Tribulus 45 helps increase sexual desire, muscle mass and energy level.

Storage

Store in a cool dry place.

Precautions

Keep out of reach of children.

Precautions/Warnings: Do not use if bottle seal is missing, torn or damaged.

If you are pregnant, nursing, taking any medication or have a medical condition, consult your healthcare practitioner before taking any dietary supplement.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

FDA Statement of Identity

Herbal Dietary Supplement

Suggested/Recommended/Usage/Directions

Suggested Use: Take one capsule daily with a meal or as directed by a healthcare professional.

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

See for yourself

Tribulus 45 by AFI America's Finest label

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

Tribulus 45 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 45 by AFI America's Finest

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

Serving size1 Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.

Tribulus terrestris aerial parts extract

Interacts with
259 drugs
550 mg per serving Form: Steroidal Saponins

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

Tribulus terrestris aerial parts extract monograph & interactions

Other (inactive) ingredients: Rice Flour, Magnesium Stearate, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.

Interaction report

Tribulus 45 by AFI America's Finest Drug Interactions

Want to check YOUR meds against Tribulus 45?

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

Tribulus terrestris aerial parts extract 259

Individual Drug Interactions

The ingredients in Tribulus 45 interact with 259 drugs. Click any drug to see the details.

1 of the 1 ingredient in Tribulus 45 interact with drugs. Each result below shows which ingredient is responsible. Tribulus terrestris aerial parts extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Tribulus 45 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.

Tribulus terrestris aerial parts extract3 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
Tribulus terrestris aerial parts extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Tribulus 45, from the product label.

AFI America's Finest

See all AFI America's Finest products
Name
America's Finest, Inc. (AFI)
City
East Windsor
State
NJ
ZipCode
08520
Phone Number
800-350-3305
Web Address
www.afisupplements.com
Pharmacist Counseling Corner

Tribulus 45 by AFI America's Finest: Common Questions

Does Tribulus 45 by AFI America's Finest interact with any medications?
Yes. Based on its ingredients, Tribulus 45 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 45 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 45 if I'm pregnant?
No, the safety data advise against it. Tribulus may affect hormones and safety hasn't been established in pregnancy. Talk with your doctor or pharmacist about what's right for you.
Can I take it while breastfeeding?
The data we have aren't reliable enough to know if it's safe while breastfeeding. Avoid it for now and check with your doctor or pharmacist about your options.
Does it really work for sexual dysfunction?
The evidence says it's possibly effective, meaning some clinical studies show benefit, but it's not a proven cure. Results vary from person to person.
What side effects might I notice?
Most people tolerate it well, but stomach upset — cramping, nausea, diarrhea, or constipation — can happen. Serious effects like liver or kidney injury are rare. Stop and contact your doctor if you notice anything concerning.
Will it help me with athletic performance?
The evidence suggests it won't — it's rated possibly ineffective for athletic performance based on the research we have.
How long can I safely take this product?
Short-term use in healthy adults is generally well tolerated, but we don't have solid long-term safety data. Chat with your doctor or pharmacist about how long is right for you.

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

Not sure if Tribulus 45 is safe with your meds?

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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 45 label
Go deeper

The Full Monographs Behind Tribulus 45’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 45'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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