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Dietary supplement

Longjack Extract Ingredients & Drug Interactions

by BulkSupplements.com

Longjack Extract label
See full label image
Powder 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 Longjack Extract 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 Extract is a dietary supplement by BulkSupplements.com 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 Longjack Root 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 Longjack Extract by BulkSupplements.com

Ask about any prescription or over-the-counter medication and we check it for interactions with Longjack Extract by BulkSupplements.com — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Longjack Extract by BulkSupplements.com

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 product contains one active ingredient: Longjack Root Extract (Eurycoma longifolia). It's sold as a powder with no other active ingredients listed.

There are no inactive fillers or excipients on file for this product.

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: Male vitality and testosterone support.
  • We looked for evidence on: Age-related testosterone deficiency, Athletic performance, Erectile dysfunction (ED), Male Infertility, Muscle strength, Sexual desire — and 3 related terms.
  • 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 Erectile dysfunction (ED), Muscle strength, Age-related testosterone deficiency, Male Infertility.

Longjack extract is possibly effective for sexual desire based on the evidence we hold. For athletic performance, the data suggests it's possibly ineffective.

The evidence isn't established for back pain, osteoporosis, or diabetes — there simply isn't enough reliable data to say whether it works for those purposes.

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.

Short-term use appears generally well tolerated in studies, but long-term safety data and quality control of products aren't well documented. There's a key caution: the extract may raise testosterone levels beyond the normal range, which could lead to acne, insulin resistance, liver damage, and other testosterone-related side effects.

Because of possible hormonal effects and insufficient safety data, the facts advise against use during pregnancy and breastfeeding.

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 if you take propranolol (Inderal) or any heart-rhythm or blood-pressure medication — this extract can reduce how well propranolol works. Also double-check before combining it with testosterone therapy or medications that are processed through liver enzymes CYP1A2, CYP2C19, or CYP2A6, because the extract may raise their levels.

The enzyme interactions are theoretical but 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.

Longjack Extract may be worth considering if you're interested in sexual desire support, though the evidence is modest. If you take propranolol, heart medications, blood thinners, or testosterone therapy, you'll need to check with your doctor or pharmacist first — the interactions are real.

Anyone who's pregnant, breastfeeding, or concerned about testosterone levels should talk it over with their healthcare provider before starting.

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 Apr 23, 2024.

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 Extract, straight from the product label.

Brand BulkSupplements.com
Barcode (UPC) X000IWOY6H
Net contents 500 Gram(s); 17.6 Ounce(s)
Market status On market
Date entered into DSLD Apr 23, 2024
DSLD ID 312200
Product type Botanical
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult Male (18-50 Years), Gluten Free, Dairy 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 Extract by BulkSupplements.com, 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:
80 mg
Maximum serving Sizes:
80 mg
Servings per container
6250
UPC/BARCODE
X000IWOY6H
IngredientAmount% DV
Longjack Root Extract80 mg--

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)

BulkSupplements.com Clean & Pure Bulk Supplements

Formulation

Color may vary

Free of: Added sugar, soy, dairy, yeast, gluten, additives

Tongkat Ali for Men Testosterone and Energy Increased Libido

FDA Disclaimer Statement

Warning: This product is not intended to diagnose, treat, cure, or prevent any disease.

Precautions

Always consult a physician before taking any dietary supplement.

Keep out of reach of children.

Suggested/Recommended/Usage/Directions

Suggested use: As a dietary supplement, take 80 mg once daily or as directed by a physician.

Storage

Store in a dry, cool place

General Statements

Use an accurate milligram scale. Contents are sold by weight, not volume. Settling may occur. New

Formula

(Tongkat Ali) BulkSupplements.com Longjack Extract 100:1 Powder

Tongkat Ali for Men Testosterone and Energy Increased Libido

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

See for yourself

Longjack Extract by BulkSupplements.com label

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

Longjack Extract 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 Extract by BulkSupplements.com

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

Serving size80 mg Dosage formPowder Servings per container6250 Amounts shown are per serving.

Longjack Root Extract

Interacts with
248 drugs
80 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...

Longjack Root Extract monograph & interactions
Interaction report

Longjack Extract by BulkSupplements.com Drug Interactions

Want to check YOUR meds against Longjack Extract?

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

Longjack Root Extract 248

Individual Drug Interactions

The ingredients in Longjack Extract interact with 248 drugs. Click any drug to see the details.

1 of the 1 ingredient in Longjack Extract interact with drugs. Each result below shows which ingredient is responsible. Longjack Root Extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Longjack Extract 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.

Longjack 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
Longjack Root Extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Longjack Extract, from the product label.

BulkSupplements.com

See all BulkSupplements.com products
Name
BulkSupplements.com
Street Address
7511 Eastgate Rd
City
Henderson
State
NV
ZipCode
89011
Web Address
BulkSupplements.com
Pharmacist Counseling Corner

Longjack Extract by BulkSupplements.com: Common Questions

Does Longjack Extract by BulkSupplements.com interact with any medications?
Yes. Based on its ingredients, Longjack Extract 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 Extract 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.
What is Longjack used for?
Longjack extract is possibly effective for sexual desire. The evidence for athletic performance is not strong — it's rated possibly ineffective — and there isn't enough reliable data to say whether it works for back pain, osteoporosis, or diabetes.
Can I take Longjack if I'm pregnant or breastfeeding?
No — the product facts advise against it. During pregnancy, there's not enough safety data and possible hormonal effects are a concern. While breastfeeding, there's no reliable safety information, so it's best to avoid it. Talk with your doctor or pharmacist if you have questions about your individual situation.
What are the side effects of Longjack?
Short-term use is generally well tolerated in studies. The main concern is that Longjack may raise testosterone levels beyond normal, which could cause acne, insulin resistance, liver damage, and other testosterone-related effects. Long-term safety data is limited.
Does Longjack interact with my medications?
Yes — it has documented interactions with several medication types. Most seriously, it can reduce how well propranolol works. It may also affect how your body processes medications through liver enzymes and may increase testosterone levels if you're on testosterone therapy. Use the medication search tool on this page to check your specific drugs, and talk with your pharmacist or doctor before starting.
Is Longjack powder safe to take long-term?
The product facts note that while short-term use appears tolerated in studies, long-term safety is uncertain and product quality varies. If you're considering long-term use, discuss it with your doctor or pharmacist.
How much Longjack extract should I take?
The product facts don't specify a recommended dose — that information isn't on file. Check the label on your package or talk with your pharmacist or doctor about the right amount for your needs.

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

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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.

Longjack Extract label
Go deeper

The Full Monographs Behind Longjack Extract’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 Extract'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

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