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Dietary supplement

Horny Goat Weed 1,000 mg Ingredients & Drug Interactions

by Double Wood Supplements

Horny Goat Weed 1,000 mg 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 Horny Goat Weed 1,000 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

Horny Goat Weed 1,000 mg is a dietary supplement by Double Wood Supplements with 1 active ingredient. Its ingredients are commonly taken for erectile dysfunction, low libido, fatigue and low energy.Based on those ingredients, 965 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Horny Goat Weed 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 Horny Goat Weed 1,000 mg by Double Wood Supplements

Ask about any prescription or over-the-counter medication and we check it for interactions with Horny Goat Weed 1,000 mg by Double Wood Supplements — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Horny Goat Weed 1,000 mg by Double Wood Supplements

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

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: horny goat weed extract at 1,000 mg per capsule. The capsule itself is made with hypromellose, an inactive ingredient that helps hold the supplement together.

Does it work?

Not established
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
Not established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use — see Horny Goat Weed's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: men's health supplement.
  • We looked for evidence on: Erectile dysfunction (ED), Fatigue, Male infertility, Sexual dysfunction, Postmenopausal conditions, Low libido — and 2 related terms.
  • The closest evidence on file: Horny Goat Weed is rated "Insufficient Reliable Evidence To Rate" for Sexual dysfunction (Natural Medicines).
  • Also on file: Horny Goat Weed is rated "Insufficient Reliable Evidence To Rate" for Erectile dysfunction (ED), Fatigue, Postmenopausal conditions, Male infertility.

The evidence for horny goat weed is not yet established. Studies have not gathered enough reliable data to rate whether it works for sexual dysfunction, osteoporosis, bronchitis, or heart disease.

If you're considering it for any of these reasons, there's no solid proof yet that it will help.

The evidence, ingredient by ingredient Horny Goat Weed

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 of horny goat weed is generally well tolerated, though the quality of products varies. The most common side effects reported are dizziness, dry mouth, nosebleed, thirst, and vomiting.

Long-term use has been tied to similar effects — vomiting, dry mouth, thirst, and nosebleed — in reports. Respiratory arrest has been reported rarely.

One case describes a 66-year-old man with a history of heart disease who developed an irregular heartbeat (tachyarrhythmia) after two weeks of use, though it's unclear whether this product was pure horny goat weed or a mix, so causality can't be confirmed. During pregnancy, the safety data advises against use — not enough information to know it's safe.

While breastfeeding, there isn't enough safety data to know either way; talk with your doctor or pharmacist for personalized advice.

Side effects, ingredient by ingredient Horny Goat Weed

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 — Horny Goat Weed.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 966 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 you start, double-check if you take any blood thinners or antiplatelet drugs (warfarin, aspirin, clopidogrel, and others), blood pressure medications, estrogen products, or any drug metabolized by liver enzymes CYP1A2, CYP2B6, or CYP3A4 — a huge list including many common prescriptions. All of these are Moderate-severity concerns with horny goat weed.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.

Horny goat weed is one to be cautious with. If you take blood thinners, blood pressure medications, estrogen, or any drug processed by your liver, check with us or your pharmacist first — the interaction list is long.

The evidence that it works for sexual dysfunction or other common reasons people take it isn't established yet. Short-term side effects are mild in most cases, but long-term safety data is limited.

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 Aug 22, 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 Horny Goat Weed 1,000 mg, straight from the product label.

Brand Double Wood Supplements
Barcode (UPC) X002LY7JOJ
Net contents 90 Capsule(s)
Market status On market
Date entered into DSLD Aug 22, 2024
DSLD ID 315650
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) 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 Horny Goat Weed 1,000 mg by Double Wood Supplements, 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
45
UPC/BARCODE
X002LY7JOJ
IngredientAmount% DV
Horny Goat Weed 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

Product information: Double Wood's Horny Goat Weed is a herb (Epimedium) that many people use as a men's health supplement. The active ingredient which provides benefits is called "Icariins". It is important to use a Horny Goat Weed supplement standardized to contain Icariins.

Horny Goat Weed 1,000 mg per serving 20% Icariins

Suggested/Recommended/Usage/Directions

Suggested use: As a dietary supplement, take 1 serving per day. (2 capsules)

Storage

Storage: Store in a cool, dark place. Do not freeze or expose to moisture or heat above room temperature.

Seals/Symbols

Proudly made in USA Made with Non-GMO ingredients

Formulation

Made with non-GMO ingredients Gluten free

No fillers

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

Dietary Supplement

Precautions

Warning: Do not exceed recommended dose. Discontinue use and consult your doctor immediately if any adverse reactions occur. Do not use Horny Goat Weed and operate heavy machinery until you know how it affects you. Do not use if safety seal is damaged or missing.

Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.

Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement. Keep out of the reach of children.

General Statements

Glycine supplemen...e New

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

See for yourself

Horny Goat Weed 1,000 mg by Double Wood Supplements label

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

Horny Goat Weed 1,000 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 Horny Goat Weed 1,000 mg by Double Wood Supplements

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 container45 Amounts shown are per serving.

Horny Goat Weed Extract

Interacts with
965 drugs
1000 mg per serving Form: Icariin

Horny goat weed (Epimedium) is a traditional Chinese herb most often marketed for low libido and erectile problems, but solid human evidence for these...

Horny Goat Weed Extract monograph & interactions

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

Interaction report

Horny Goat Weed 1,000 mg by Double Wood Supplements Drug Interactions

Want to check YOUR meds against Horny Goat Weed 1,000 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
965Drugs
965 Moderate

Ingredients driving the most interactions

Horny Goat Weed Extract 965

Individual Drug Interactions

The ingredients in Horny Goat Weed 1,000 mg interact with 965 drugs. Click any drug to see the details.

1 of the 1 ingredient in Horny Goat Weed 1,000 mg interact with drugs. Each result below shows which ingredient is responsible. Horny Goat Weed Extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Horny Goat Weed 1,000 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.

Horny Goat Weed Extract6 drug types · 965 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, horny goat weed might increase the risk of bleeding.
In vitro research and animal research shows that horny goat weed can inhibit platelet aggregation and thrombus formation. This effect has not been reported in humans.

Likelihood Possible Evidence D
Antihypertensive Drugs

Theoretically, horny goat weed might increase the risk of hypotension.
Laboratory research suggests that horny goat weed might have hypotensive effects. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, horny goat weed might increase the effects and side effects of CYP1A2 substrates.
In vitro, horny goat weed leaf extract inhibits CYP1A2. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2B6 (Cyp2B6) Substrates

Theoretically, horny goat weed might increase the effects and side effects of CYP2B6 substrates.
In vitro, horny goat weed leaf extract inhibits CYP2B6. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, horny goat weed might increase the effects and side effects of CYP3A4 substrates.
In vitro, horny goat weed extract inhibits CYP3A4 and suppresses CYP3A4 mRNA expression. This effect has not been reported in humans.

Likelihood Possible Evidence D
Estrogens

Theoretically, concomitant use of horny goat weed with estrogens might increase their therapeutic and adverse effects.
In vitro evidence suggests that horny goat weed has estrogenic activity. In clinical research, horny goat weed has been shown to increase blood levels of estrogen in some females.

Likelihood Possible Evidence D
Horny Goat Weed Extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Horny Goat Weed 1,000 mg, from the product label.

Double Wood Supplements

See all Double Wood Supplements products
Name
Double Wood LLC
Street Address
3510 Scotts Ln Ste 219
City
Philadelphia
State
PA
ZipCode
19129-1573
Web Address
www.doublewoodsupplements.com
Pharmacist Counseling Corner

Horny Goat Weed 1,000 mg by Double Wood Supplements: Common Questions

Does Horny Goat Weed 1,000 mg by Double Wood Supplements interact with any medications?
Yes. Based on its ingredients, Horny Goat Weed 1,000 mg has a known interaction with 965 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Horny Goat Weed 1,000 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.
Does horny goat weed actually work for sexual dysfunction?
The evidence isn't established yet. Studies haven't gathered enough reliable data to say whether it works for this purpose. If you're thinking of trying it, talk with your doctor or pharmacist about whether it makes sense for you.
What are the most common side effects?
The most common ones reported are dizziness, dry mouth, nosebleed, thirst, and vomiting. These tend to occur with short-term use. Long-term use has been linked to similar effects, especially vomiting, dry mouth, thirst, and nosebleed.
Is it safe to take while pregnant?
No. The safety data advises against horny goat weed during pregnancy — there isn't enough information to know it's safe.
Is it safe to take while breastfeeding?
There isn't enough safety data to know either way. Talk with your doctor or pharmacist for advice specific to your situation.
What is horny goat weed, exactly?
Horny goat weed is a plant extract — the single active ingredient in this product. It's been used in traditional medicine, though modern research on whether it actually works is still limited.
Does this product contain any fillers?
The capsule itself is made with hypromellose, an inactive ingredient that acts as a binder. Other than that, there are no additional fillers listed.

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

Not sure if Horny Goat Weed 1,000 mg 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.

Horny Goat Weed 1,000 mg label
Go deeper

The Full Monographs Behind Horny Goat Weed 1,000 mg’s Ingredients

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

Herb & supplement monograph

Horny Goat Weed

Interacts with 965 drugs

Horny goat weed (Epimedium) is a traditional Chinese herb most often marketed for low libido and erectile problems, but solid human evidence for these uses is lacking. While short-term use s...

Read the full Horny Goat Weed monograph →
Sources

Sources & How We Checked

Horny Goat Weed 1,000 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 11 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.

Horny Goat Weed 11 references
  1. Cirigliano MD, Szapary PO. Horny goat weed for erectile dysfunction. Alt Med Alert 2001;4:19-22.
  2. Partin JF, Pushkin YR. Tachyarrhythmia and hypomania with horny goat weed. Psychosomatics 2004;45:536-7. PubMed
  3. De Naeyer A, Pocock V, Milligan S, De Keukeleire D. Estrogenic activity of a polyphenolic extract of the leaves of Epimedium brevicornum. Fitoterapia 2005;76:35-40. PubMed
  4. Zhang CZ, Wang SX, Zhang Y, et al. In vitro estrogenic activities of Chinese medicinal plants traditionally used for the management of menopausal symptoms. J Ethnopharmacol 2005;98:295-300. PubMed
  5. Yap SP, Shen P, Li J, et al. Molecular and pharmacodynamic properties of estrogenic extracts from the traditional Chinese medicinal herb, Epimedium. J Ethnopharmacol 2007;113:218-24. PubMed
  6. Yan, F. F., Liu, Y., Liu, Y. F., and Zhao, Y. X. Herba Epimedii water extract elevates estrogen level and improves lipid metabolism in postmenopausal women. Phytother.Res. 2008;22(9):1224-1228. PubMed
  7. Ramanathan VS, Mitropoulos E, Shlopov B, et al. An Enzyte'ing' case of acute hepatitis. J Clin Gastroenterol 2011;45(9):834-5. PubMed
  8. Zhong Q, Shi Z, Zhang L, et al. The potential of Epimedium koreanum Nakai for herb-drug interaction. J Pharm Pharmacol 2017;69(10):1398-408. doi: 10.1111/jphp.12773.
  9. Irfan M, Kwon TH, Lee DH, et al. Antiplatelet and Antithrombotic Effects of Epimedium koreanum Nakai. Evid Based Complement Alternat Med. Apr 2021;2021:7071987. PubMed
  10. Tan K, Yang W, Pang L, Hou F. Differences in clinical characteristics among 726 patients with Chinese herbal medicine- or Western medicine-induced liver injury. Medicine (Baltimore) 2022;101(32):e29909. PubMed
  11. Li K, Yu XH, Maskey AR, et al. Cytochrome P450 3A4 suppression by epimedium and active compound kaempferol leads to synergistic anti-inflammatory effect with corticosteroid. Front Pharmacol 2023;13:1042756. PubMed

See these in context on the Horny Goat Weed 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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