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Dietary supplement

Longjack Extract 1000 mg Veg Capsules Ingredients & Drug Interactions

by BulkSupplements.com

Longjack Extract 1000 mg Veg Capsules 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 Longjack Extract 1000 mg Veg Capsules 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 1000 mg Veg Capsules 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 Eurycoma 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 1000 mg Veg Capsules by BulkSupplements.com

Ask about any prescription or over-the-counter medication and we check it for interactions with Longjack Extract 1000 mg Veg Capsules by BulkSupplements.com — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Longjack Extract 1000 mg Veg Capsules 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 Oct 1, 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: Eurycoma Longjack root extract (also known as Eurycoma longifolia), supplied at 1,000 mg per capsule. The capsule itself is made from hypromellose, a plant-based shell material.

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 sexual function and testosterone support.
  • We looked for evidence on: Age-related testosterone deficiency, Erectile dysfunction (ED), Male Infertility, Muscle strength, Sexual desire, libido — and 1 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 "Insufficient Reliable Evidence To Rate" for Erectile dysfunction (ED), Muscle strength, Age-related testosterone deficiency, Male Infertility.

The evidence for Longjack is mixed and limited. Sexual desire is rated possibly effective — meaning some research supports it, but the data isn't yet conclusive.

Athletic performance, by contrast, is rated possibly ineffective. For back pain, osteoporosis, and diabetes, the evidence we hold is insufficient to rate, so we can't say whether the extract works for those uses or not.

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.

Longjack is generally well tolerated in short-term studies, but long-term safety data and the quality of commercial products remain uncertain. One key concern is that the extract may raise testosterone levels beyond the normal range, which could trigger testosterone-related side effects including acne, insulin resistance, and liver damage.

Because of possible hormonal effects and insufficient safety data, the extract should be avoided 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 before you start if you take propranolol (Inderal) — this extract can reduce its effectiveness by a significant margin. You should also verify any medications your liver metabolizes using CYP1A2, CYP2C19, or CYP2A6 pathways, and any testosterone therapy, though those interactions are theoretical and not yet confirmed in humans.

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 may be worth considering if you're interested in sexual desire support and your medications don't conflict with it. However, if you take propranolol or other drugs metabolized by your liver, or if you're on testosterone therapy, you'll want to check your exact medications first.

Talk with your doctor or pharmacist before starting — especially if you have concerns about testosterone levels, liver health, or hormone-sensitive conditions.

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, 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 1000 mg Veg Capsules, straight from the product label.

Brand BulkSupplements.com
Barcode (UPC) X003GSRP75
Net contents 120 Capsule(s)
Market status On market
Date entered into DSLD Jul 25, 2024
DSLD ID 312920
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (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 1000 mg Veg Capsules 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:
2 Veg Capsule(s)
Maximum serving Sizes:
2 Veg Capsule(s)
Servings per container
60
UPC/BARCODE
X003GSRP75
IngredientAmount% DV
Eurycoma Longjack root extract1000 mg--

Other ingredients: Hypromellose

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.
Formula

Longjack Extract Veg Capsules 1000 mg per serving

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take 2 capsules daily, or as directed by a physician.

FDA Disclaimer Statement

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

Formulation

Always consult a physician before taking any dietary supplement.

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

Precautions

Keep out of reach of children.

Storage

Store in a dry, cool place

General Statements

New Scan Me

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See for yourself

Longjack Extract 1000 mg Veg Capsules by BulkSupplements.com label

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

Longjack Extract 1000 mg Veg Capsules 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 1000 mg Veg Capsules by BulkSupplements.com

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

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

Eurycoma Longjack root extract

Interacts with
248 drugs
1000 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...

Eurycoma Longjack root extract monograph & interactions

Other (inactive) ingredients: Hypromellose. These complete the product’s ingredient list but are not active constituents.

Interaction report

Longjack Extract 1000 mg Veg Capsules by BulkSupplements.com Drug Interactions

Want to check YOUR meds against Longjack Extract 1000 mg Veg Capsules?

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

Eurycoma Longjack root extract 248

Individual Drug Interactions

The ingredients in Longjack Extract 1000 mg Veg Capsules interact with 248 drugs. Click any drug to see the details.

1 of the 1 ingredient in Longjack Extract 1000 mg Veg Capsules interact with drugs. Each result below shows which ingredient is responsible. Eurycoma Longjack root extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Longjack Extract 1000 mg Veg Capsules 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.

Eurycoma 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
Eurycoma Longjack root extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Longjack Extract 1000 mg Veg Capsules, 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 1000 mg Veg Capsules by BulkSupplements.com: Common Questions

Does Longjack Extract 1000 mg Veg Capsules by BulkSupplements.com interact with any medications?
Yes. Based on its ingredients, Longjack Extract 1000 mg Veg Capsules 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 1000 mg Veg Capsules 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 work for sexual performance?
Sexual desire is rated possibly effective, which means some research backs it up but the evidence isn't rock solid yet. Results vary, and it's worth talking to your doctor about whether it makes sense for your situation.
Is it safe to take long-term?
We don't have good long-term safety data for Longjack. Short-term studies show it's generally tolerated, but how it performs over months or years isn't well established. If you're thinking of taking it regularly, check in with your doctor or pharmacist first.
Can I take this if I'm pregnant or breastfeeding?
No — there isn't enough safety data, and the extract may have hormonal effects. Both pregnancy and breastfeeding are reasons to avoid it. Talk with your doctor or pharmacist about what's safe for you.
What are the side effects?
If the extract raises your testosterone too high, you might experience acne, insulin resistance, or liver damage. The extract may increase testosterone levels, so if you already have elevated testosterone or are sensitive to hormonal changes, that's something to discuss with your doctor before starting.
Can I take this with propranolol?
Longjack can lower propranolol levels by about 29%, which may make the blood pressure or heart medication less effective. Don't start this without checking with your doctor or pharmacist — you may need a dose adjustment or a different approach.
Does this product contain any fillers?
The capsule is made from hypromellose, which is the shell material. There are no other inactive ingredients listed.

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 1000 mg Veg Capsules label
Go deeper

The Full Monographs Behind Longjack Extract 1000 mg Veg Capsules’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 1000 mg Veg Capsules'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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