Interactions on record — worth a quick check against your medications. Check your meds →
Dietary supplement

Longjack Tongkat Ali 1200 mg Ingredients & Drug Interactions

by Bronson

Longjack Tongkat Ali 1200 mg label
See full label image
Capsule 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 Longjack Tongkat Ali 1200 mg 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

Longjack Tongkat Ali 1200 mg is a dietary supplement by Bronson with 1 active ingredient. Its ingredients are commonly taken for low testosterone or low libido in men, male fertility support, athletic performance and muscle strength.Based on those ingredients, 248 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Tongkat Ali root extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Longjack Tongkat Ali 1200 mg by Bronson

Ask about any prescription or over-the-counter medication and we check it for interactions with Longjack Tongkat Ali 1200 mg by Bronson — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
Prefer a human? Send your question to our licensed pharmacists — free, answered by email within 24 hours.

HelloPharmacist Scorecard of Longjack Tongkat Ali 1200 mg by Bronson

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 Aug 20, 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.

This supplement contains one active ingredient: Tongkat Ali root extract at 1200 mg per capsule. Tongkat Ali is a traditional Southeast Asian herb believed to support male vitality and sexual function.

The capsule also holds inactive ingredients — microcrystalline cellulose, cellulose, magnesium stearate, and silicon dioxide — which are common binders and fillers that help hold the supplement together.

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: supports healthy libido, energy and stamina.
  • We looked for evidence on: Sexual desire, Athletic performance, Muscle strength, Male Infertility, testosterone support, male vitality.
  • The strongest evidence on file: Eurycoma Longifolia is rated "Possibly Effective" for Sexual desire (Natural Medicines).
  • Also on file: Eurycoma Longifolia is rated "Possibly Ineffective" for Athletic performance.
  • Also on file: Eurycoma Longifolia is rated "Insufficient Reliable Evidence To Rate" for Muscle strength, Male Infertility.

The evidence supports Tongkat Ali for sexual desire, where it is rated possibly effective based on available research. For athletic performance, the evidence suggests it is possibly ineffective.

For back pain, osteoporosis, and diabetes, we hold insufficient reliable evidence to know whether it works — the research either doesn't exist, is too limited, or is unclear.

The evidence, ingredient by ingredient Eurycoma Longifolia

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.

Tongkat Ali is generally well tolerated in short-term studies, though long-term safety and the quality of different products on the market remain uncertain. The main concern is that the extract may raise testosterone levels, especially if you're already on testosterone replacement — if your levels climb too high, you risk side effects like acne, insulin resistance, and liver stress.

Because of possible hormonal effects and a lack of safety data, the facts advise against it during pregnancy and breastfeeding. If you're pregnant, planning pregnancy, or nursing, talk with your doctor or pharmacist before taking this product.

Side effects, ingredient by ingredient Eurycoma Longifolia

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 — Eurycoma Longifolia.
  • The most serious interaction on file is rated Moderate.
  • For scale: 248 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.

Check with your doctor or pharmacist before taking this if you use propranolol or other beta-blockers — this supplement can reduce how well they work. Also double-check if you take antidepressants, anti-anxiety medications, blood thinners, pain relievers, psychiatric drugs, asthma medications, or testosterone.

These effects are theoretically based in some cases and not yet seen in people, but they're worth confirming with your own provider.

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.

Tongkat Ali may help with sexual desire if the research holds for you, but it carries real interaction risks — especially with heart medications and drugs your liver breaks down. If you take any prescription medication, check it against this product first with your doctor or pharmacist.

Long-term safety is still uncertain, and hormonal effects are a concern if your testosterone is already high or if you're pregnant or breastfeeding.

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 22, 2023.

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 Longjack Tongkat Ali 1200 mg, straight from the product label.

Brand Bronson
Barcode (UPC) X0031MBT4V
Net contents 120 Vegetarian Capsule(s)
Market status On market
Date entered into DSLD Nov 22, 2023
DSLD ID 298887
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Women (not pregnant or lactating), Adult Male (18-50 Years), Gluten Free
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 Longjack Tongkat Ali 1200 mg by Bronson, 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:
2 Capsule(s)
Maximum serving Sizes:
2 Capsule(s)
Servings per container
60
UPC/BARCODE
X0031MBT4V
IngredientAmount% DV
Tongkat Ali root extract1200 mg--

Other ingredients: Microcrystalline Cellulose, Cellulose, 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.
Brand IP Statement(s)

Bronson Since 1960 Nutrition+

Formula

Longjack tongkat ali Extra strength 1200 mg per serving

Formulation

Supports a healthy libido Energy and stamina

Non-gmo Gluten-free Soy-free

Lab tested Made from high quality ingredients

FDA Statement of Identity

Dietary Supplement

General Statements

120 count

365 days 100% money back guaranteed

Nutrition questions or comments? Call 1-800-235-3200 Mon. - Fri. 7 AM - 6 PM MST Sat. 8 AM - 4:30 PM MST New

Suggested/Recommended/Usage/Directions

Directions: As a dietary supplement for adult males only, take 2 capsules daily, preferably with a meal or as directed by a healthcare professional.

Precautions

Warning: Do not take this product if you are pregnant or nursing. Consult a healthcare professional before taking this product if you have any medical condition or taking any medications.

Discontinue use and consult a healthcare professional if and adverse reactions occur.

Do not use if seal under cap is broken or missing.

Keep out of reach of children.

Storage

Store at room temperature.

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.

Seals/Symbols

GMP good manufacturing practice

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

See for yourself

Longjack Tongkat Ali 1200 mg by Bronson label

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

Longjack Tongkat Ali 1200 mg 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 Longjack Tongkat Ali 1200 mg by Bronson

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

Serving size2 Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.

Tongkat Ali root extract

Interacts with
248 drugs
1200 mg per serving

Eurycoma longifolia (tongkat ali) is a Southeast Asian herb most popular for supporting testosterone, libido, and male fertility, with some small huma...

Tongkat Ali root extract monograph & interactions

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

Interaction report

Longjack Tongkat Ali 1200 mg by Bronson Drug Interactions

Want to check YOUR meds against Longjack Tongkat Ali 1200 mg?

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
248Drugs
3 Moderate 245 Minor

Ingredients driving the most interactions

Tongkat Ali root extract 248

Individual Drug Interactions

The ingredients in Longjack Tongkat Ali 1200 mg interact with 248 drugs. Click any drug to see the details.

1 of the 1 ingredient in Longjack Tongkat Ali 1200 mg interact with drugs. Each result below shows which ingredient is responsible. Tongkat Ali root extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Longjack Tongkat Ali 1200 mg 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.

Tongkat Ali root extract5 drug types · 248 drugs

Propranolol (Inderal)

Eurycoma longifolia can reduce the levels and clinical effects of propranolol.
A small clinical study in healthy persons shows that taking a single dose of a water-based Eurycoma longifolia extract 200 mg, in combination with a single dose of propranolol 80 mg, reduces the propranolol area under the curve (AUC) by 29%, reduces the peak concentration by 42%, and increases time to peak concentration by 86% when compared with control. Since the elimination half-life of propranolol did not change, it seems that Eurycoma longifolia alters the kinetics of propranolol by decreasing its absorption in the gut, and not by altering its metabolism. It is not known if separating administration will prevent this interaction.

Likelihood Probable Evidence A
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, Eurycoma longifolia might increase levels CYP1A2 substrates.
In vitro research suggests that methanolic Eurycoma longifolia root extract weakly inhibits CYP1A2 enzymes. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2A6 (Cyp2A6) Substrates

Theoretically, Eurycoma longifolia might increase levels of CYP2A6 substrates.
In vitro research suggests that methanolic Eurycoma longifolia root extract weakly inhibits CYP2A6 enzymes. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2C19 (Cyp2C19) Substrates

Theoretically, Eurycoma longifolia might increase levels of CYP2C19 substrates.
In vitro research suggests that methanolic Eurycoma longifolia root extract weakly inhibits CYP2C19 enzymes. This effect has not been reported in humans.

Likelihood Possible Evidence D
Testosterone

Theoretically, Eurycoma longifolia may further increase levels of testosterone.
A clinical study in aging males with testosterone levels below 300 ng/dL shows that taking a specific water extract of Eurycoma longifolia roots (Physta; Biotropics Malaysia) 100-200 mg daily with breakfast for 12 weeks increases total testosterone levels by 8% to 11% when compared with placebo. It is unclear whether this increase would occur in individuals with normal testosterone levels.

Likelihood Possible Evidence D
Tongkat Ali root extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Longjack Tongkat Ali 1200 mg, from the product label.

Bronson

Name
Bronson Laboratories
Street Address
70 Commerce Drive
City
Hauppauge
State
NY
ZipCode
11788
Phone Number
1-800-235-3200
Web Address
BronsonVitamins.com
Pharmacist Counseling Corner

Longjack Tongkat Ali 1200 mg by Bronson: Common Questions

Does Longjack Tongkat Ali 1200 mg by Bronson interact with any medications?
Yes. Based on its ingredients, Longjack Tongkat Ali 1200 mg has a known interaction with 248 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Longjack Tongkat Ali 1200 mg 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.
Will this help my sexual desire?
Tongkat Ali is rated possibly effective for sexual desire based on the research we hold. That means some evidence supports it, but it's not a guarantee it'll work for you — results vary by person. Talk with your doctor about whether it makes sense for your situation.
Can I take this if I'm pregnant or breastfeeding?
No. There isn't enough safety data and possible hormonal effects, so it's best to avoid it during pregnancy and while breastfeeding. If you're considering it and you're pregnant, nursing, or planning pregnancy, talk with your doctor or pharmacist first.
What are the side effects?
Tongkat Ali is generally well tolerated in short-term use. The main concern is if it raises your testosterone too much — high testosterone can cause acne, insulin resistance, and liver stress. Long-term safety is uncertain because long-term studies are limited.
Does this work for athletic performance?
No — the evidence suggests Tongkat Ali is possibly ineffective for athletic performance. If you're taking it for that reason, the research doesn't support that use.
Is there anything in this I should know about?
It contains one active ingredient, Tongkat Ali root extract, plus common binders like cellulose and silicon dioxide. The main thing to watch is interactions with medications and the possibility it can raise testosterone, which matters if you're already on hormone therapy or have high testosterone.

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

Not sure if Longjack Tongkat Ali 1200 mg is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

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.

Longjack Tongkat Ali 1200 mg label
Go deeper

The Full Monographs Behind Longjack Tongkat Ali 1200 mg’s Ingredients

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

Herb & supplement monograph

Eurycoma Longifolia

Interacts with 248 drugs

Eurycoma longifolia (tongkat ali) is a Southeast Asian herb most popular for supporting testosterone, libido, and male fertility, with some small human studies suggesting possible benefits....

Read the full Eurycoma Longifolia monograph →
Sources

Sources & How We Checked

Longjack Tongkat Ali 1200 mg'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 4 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.

Eurycoma Longifolia 4 references
  1. Salman SA, Amrah S, Wahab MS, et al. Modification of propranolol's bioavailability by Eurycoma longifolia water-based extract. J Clin Pharm Ther 2010;35:691-6. PubMed
  2. Tambi MI, Imran MK, Henkel RR. Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late-onset hypogonadism? Andrologia 2011 Jun 15. doi: 10.1111/j.1439-0272.2011.01168.x. [Epub ahead of pri PubMed
  3. Han YM, Kim IS, Rehman SU, Choe K, Yoo HH. In vitro evaluation of the effects of Eurycoma longifolia extract on CYP-mediated drug metabolism. Evid Based Complement Alternat Med 2015;2015:631329.
  4. Chinnappan SM, George A, Pandey P, Narke G, Choudhary YK. Effect of Eurycoma longifolia standardised aqueous root extract-Physta ® on testosterone levels and quality of life in ageing male subjects: a randomised, double-blind, placebo-controlled multicent

See these in context on the Eurycoma Longifolia 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

Keep exploring
Supplement interaction checker › Check any supplement or product against your medications Drug–drug interactions › Check two or more of your medications against each other Browse medications A–Z › Every drug we've checked against herbs & supplements NDC & pricing lookup › Find a drug’s NDCs, packaging and costs Ask a pharmacist › Free, personal answer from our licensed team