Horny Goat Weed Complex Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Horny Goat Weed Complex 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
Horny Goat Weed Complex is a dietary supplement by The Vitamin Shoppe with 4 active ingredients. Its ingredients are commonly taken for erectile dysfunction, low libido, fatigue and low energy.Based on those ingredients, 1,116 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Horny Goat Weed extract, Mucuna pruriens extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Horny Goat Weed Complex by The Vitamin Shoppe
Ask about any prescription or over-the-counter medication and we check it for interactions with Horny Goat Weed Complex by The Vitamin Shoppe — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
Ask the Pharmacist
A licensed pharmacist will answer your question by email — free, usually within 24 hours.
Got it — thank you!
A licensed pharmacist will answer within 24 hours. Keep an eye on your email (worth checking spam, just in case).
HelloPharmacist Scorecard of Horny Goat Weed Complex by The Vitamin Shoppe
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.
What’s inside
Full disclosure
Horny Goat Weed Complex contains 4 active ingredients. The horny goat weed extract is the primary ingredient, traditionally used in herbal medicine.
It's combined with Macapure Maca extract, which is a food-based ingredient, mucuna pruriens extract (also called cowhage), which contains the compound levodopa, and polypodium vulgare extract. The remaining ingredients — gelatin, microcrystalline cellulose, silicon dioxide, and magnesium stearate — are inactive fillers and capsule materials.
Does it work?
Insufficient evidence
The evidence for horny goat weed's effectiveness is not established. The data we hold rates its use for sexual dysfunction, osteoporosis, bronchitis, and coronary heart disease as insufficient reliable evidence to rate.
Maca's effectiveness for amenorrhea, anemia, sexual dysfunction linked to antidepressants, athletic performance, and osteoporosis is also rated as insufficient reliable evidence. Cowhage is likewise rated insufficient for anxiety, skin inflammation, high prolactin levels, muscle pain, Parkinson's disease, and rheumatoid arthritis.
Because these are complex herbal products, real-world benefit depends on individual factors — talk with your doctor or pharmacist about whether this product fits your specific goals.
How safe is it?
Well-documented data
Horny goat weed is generally well tolerated in the short term, though human safety data is limited and quality varies between products. The most common side effects reported are dizziness, dry mouth, nosebleed, thirst, and vomiting.
Rarely, respiratory arrest has been noted. Long-term use may bring on vomiting, dry mouth, thirst, and nosebleed.
One case report described a 66-year-old man who developed an irregular heartbeat after two weeks of horny goat weed, though it's unclear if other ingredients played a role. Maca is generally well tolerated as a food but has not been studied long term as a supplement; raw maca can cause stomach pain.
Cowhage is generally well tolerated orally, though diarrhea, flatulence, and mucosal irritation are reported. Some clinical trials at higher doses (22.5 to 67.5 grams daily) noted nausea, vomiting, abdominal distention, insomnia in about 3% of participants, and headaches.
Because cowhage contains levodopa, an active drug-like compound, it requires careful use under professional guidance.
Meds to double-check
Major interaction found
Before taking this product, check with your doctor or pharmacist if you take methyldopa, monoamine oxidase inhibitors (MAOIs), or levodopa — these carry Major-severity risks. Also double-check any blood thinners or antiplatelet drugs like warfarin or aspirin, diabetes medications, birth control or estrogen, antipsychotic drugs, tricyclic antidepressants, or any anesthetics you may need.
Additionally, if you take other medications your liver processes (especially those broken down by CYP1A2, CYP2B6, or CYP3A4 pathways), run them through the checker on this page — the product may amplify their effects.
The bottom line
Scorecard at a glanceFully disclosed formula with insufficient evidence for its stated purpose. Major medication interactions have been identified, and safety information is well characterized.
This product carries several serious drug interactions — especially with blood pressure and psychiatric medications — so check your exact medications before starting. The effectiveness for sexual function and other claimed uses is not well established in the data we hold.
Short-term use of horny goat weed is generally tolerated, but cowhage is an active compound that needs professional oversight. Talk it over with your doctor or pharmacist to see if it's appropriate for you and safe alongside your current medications.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 3 of 4 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jan 25, 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
General information
Key facts about Horny Goat Weed Complex, straight from the product label.
| Brand | The Vitamin Shoppe |
|---|---|
| Barcode (UPC) | 766536018659 |
| Net contents | 60 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Jan 25, 2016 |
| DSLD ID | 55467 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free |
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 Complex by The Vitamin Shoppe, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Horny Goat Weed extract | 500 mg | -- |
| Macapure Maca extract | 250 mg | -- |
| Mucuna pruriens extract | 33 mg | -- |
| Polypodium vulgare extract | 25 mg | -- |
Other ingredients: Gelatin, Microcrystalline Cellulose, Silicon Dioxide, Magnesium Stearate
Tap any ingredient to jump to its full detail below.
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
{capsule} actual size
This natural product may vary in color.
Visit www.vitaminshoppe.com or call 1-800-223-1216 for more information and to reorder.
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.
Suggested/Recommended/Usage/Directions
DIRECTIONS: As a dietary supplement, take two (2) capsules daily, preferably with a meal. For more immediate response, take three (3) to four (4) capsules 90 minutes before activity.
Precautions
WARNING: Consult your healthcare provider prior to use if you are taking any medication or have any medical conditions.
KEEP OUT OF REACH OF CHILDREN.
TAMPER EVIDENT Do not use if outer seal is broken or missing.
Storage
STORE IN A COOL, DRY PLACE.
Brand IP Statement(s)
MacaPure is a trademark of PureWorld Botanicals.
General
Item No. VS-1865 1299544 AP 52
Formula
contains clinically studied Macapure
FDA Statement of Identity
Dietary Supplement
Formulation
gluten free dairy free soy free nut free
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Horny Goat Weed Complex by The Vitamin Shoppe label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
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)The Ingredients in Horny Goat Weed Complex by The Vitamin Shoppe
These are the 4 active ingredients this product is made of. Select any to open its full monograph.
Serving size2 Capsule(s) Dosage formCapsule Servings per container30 Amounts shown are per serving.
Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.
Horny Goat Weed extract
Interacts with963 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...
Horny Goat Weed extract monograph & interactionsMacapure Maca extract
No knowninteractions
Maca is a nutrient-rich Andean root often used for energy, libido, and menopause symptoms. Early studies suggest it may modestly help sexual desire an...
Macapure Maca extract monograph & interactionsMucuna pruriens extract
Interacts with193 drugs
Cowhage (Mucuna pruriens) is a tropical legume best known as a natural source of L-dopa, the compound the body turns into dopamine. It is most studied...
Mucuna pruriens extract monograph & interactionsPolypodium vulgare extract
Other (inactive) ingredients: Gelatin, Microcrystalline Cellulose, Silicon Dioxide, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.
Horny Goat Weed Complex by The Vitamin Shoppe Drug Interactions
HelloPharmacist Interaction Report
Horny Goat Weed Complex by The Vitamin Shoppe has notable interactions documented through its horny goat weed and mucuna pruriens (cowhage) content.
The most serious concern is with methyldopa (a blood pressure medication): cowhage contains levodopa, a compound that can dangerously lower blood pressure when combined with methyldopa, and the product should be avoided if you take that drug.
Read the full breakdown — every affected drug type, severity by severity
Cowhage also carries Major-severity interactions with monoamine oxidase inhibitors (MAOIs, older antidepressants used for depression and Parkinson's disease) — the risk is a sudden, dangerous spike in blood pressure. It also has Major interactions with levodopa itself, since cowhage already contains levodopa; taking them together could amplify levodopa's side effects.
Horny goat weed raises Moderate concerns with blood thinners and antiplatelet drugs (aspirin, warfarin, clopidogrel) because it may increase bleeding risk. Both ingredients carry Moderate interactions with drugs that lower blood sugar (diabetes medications), and horny goat weed may amplify the effects of certain other medications your liver processes — including CYP1A2, CYP2B6, and CYP3A4 substrates — or interact with estrogen-based medications like birth control.
Cowhage also has Moderate interactions with antipsychotic drugs, tricyclic antidepressants, and certain anesthetics. Altogether, these interactions span 1,117 individual medications.
We could not check polypodium vulgare extract for interactions — no data is on file for it. Please use the search tool on this page to verify your exact medications before starting.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Horny Goat Weed Complex?
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 checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Horny Goat Weed Complex interact with 1,116 drugs. Click any drug to see the details.
2 of the 4 ingredients in Horny Goat Weed Complex interact with drugs. Each result below shows which ingredient is responsible. Horny Goat Weed extract Mucuna pruriens extract
AmphetamineAdensys XR-ODT, Adzenys ER, Dyanavel XR, Mydayis
How Amphetamine interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMonoamine Oxidase Inhibitors (maois) Major
Interaction Summary
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Read the full Mucuna Pruriens Extract + Amphetamine interactionBenserazide, LevodopaMadopar, Prolopa
How Benserazide, Levodopa interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractLevodopa Major
Interaction Summary
Concomitant use can increase the risk of levodopa-related adverse effects.
Read the full Mucuna Pruriens Extract + Benserazide, Levodopa interactionCarbidopa, LevodopaDhivy, Rytary, Sinemet, Sinemet CR
How Carbidopa, Levodopa interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractLevodopa Major
Interaction Summary
Concomitant use can increase the risk of levodopa-related adverse effects.
Read the full Mucuna Pruriens Extract + Carbidopa, Levodopa interactionCarbidopa, Levodopa, EntacaponeStalevo
How Carbidopa, Levodopa, Entacapone interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractLevodopa Major
Interaction Summary
Concomitant use can increase the risk of levodopa-related adverse effects.
Read the full Mucuna Pruriens Extract + Carbidopa, Levodopa, Entacapone interactionChlorothiazide, MethyldopaAldochlor, Aldoclor 150, Aldoclor 250
How Chlorothiazide, Methyldopa interacts with Horny Goat Weed Complex — through 2 ingredients. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMethyldopa (aldomet) Major
Interaction Summary
Theoretically, concomitant use of cowhage and methyldopa might increase the risk of hypotension.
Read the full Mucuna Pruriens Extract + Chlorothiazide, Methyldopa interactionHorny Goat Weed ExtractAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, horny goat weed might increase the risk of hypotension.
Read the full Horny Goat Weed Extract + Chlorothiazide, Methyldopa interactionHydrochlorothiazide, MethyldopaAldoril 15, Aldoril 25, Aldoril D30, Methazide
How Hydrochlorothiazide, Methyldopa interacts with Horny Goat Weed Complex — through 2 ingredients. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMethyldopa (aldomet) Major
Interaction Summary
Theoretically, concomitant use of cowhage and methyldopa might increase the risk of hypotension.
Read the full Mucuna Pruriens Extract + Hydrochlorothiazide, Methyldopa interactionHorny Goat Weed ExtractAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, horny goat weed might increase the risk of hypotension.
Read the full Horny Goat Weed Extract + Hydrochlorothiazide, Methyldopa interactionIsocarboxazidMarplan
How Isocarboxazid interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMonoamine Oxidase Inhibitors (maois) Major
Interaction Summary
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Read the full Mucuna Pruriens Extract + Isocarboxazid interactionLevodopaInbrija, Larodopa
How Levodopa interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractLevodopa Major
Interaction Summary
Concomitant use can increase the risk of levodopa-related adverse effects.
Read the full Mucuna Pruriens Extract + Levodopa interactionLevodopa, CarbidopaDuodopa
How Levodopa, Carbidopa interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractLevodopa Major
Interaction Summary
Concomitant use can increase the risk of levodopa-related adverse effects.
Read the full Mucuna Pruriens Extract + Levodopa, Carbidopa interactionMethyldopaAldomet, Methyldopa
How Methyldopa interacts with Horny Goat Weed Complex — through 2 ingredients. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMethyldopa (aldomet) Major
Interaction Summary
Theoretically, concomitant use of cowhage and methyldopa might increase the risk of hypotension.
Read the full Mucuna Pruriens Extract + Methyldopa interactionHorny Goat Weed ExtractAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, horny goat weed might increase the risk of hypotension.
Read the full Horny Goat Weed Extract + Methyldopa interactionMoclobemideManerix, Moclobemide
How Moclobemide interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMonoamine Oxidase Inhibitors (maois) Major
Interaction Summary
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Read the full Mucuna Pruriens Extract + Moclobemide interactionOzanimod HydrochlorideZeposia
How Ozanimod Hydrochloride interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMonoamine Oxidase Inhibitors (maois) Major
Interaction Summary
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Read the full Mucuna Pruriens Extract + Ozanimod Hydrochloride interactionPhenelzine SulfateNardil
How Phenelzine Sulfate interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMonoamine Oxidase Inhibitors (maois) Major
Interaction Summary
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Read the full Mucuna Pruriens Extract + Phenelzine Sulfate interactionRasagilineAzilect
How Rasagiline interacts with Horny Goat Weed Complex — through 2 ingredients. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMonoamine Oxidase Inhibitors (maois) Major
Interaction Summary
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Read the full Mucuna Pruriens Extract + Rasagiline interactionHorny Goat Weed ExtractCytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, horny goat weed might increase the effects and side effects of CYP1A2 substrates.
Read the full Horny Goat Weed Extract + Rasagiline interactionSafinamide MesylateXadago
How Safinamide Mesylate interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMonoamine Oxidase Inhibitors (maois) Major
Interaction Summary
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Read the full Mucuna Pruriens Extract + Safinamide Mesylate interactionSelegilineCarbex, Eldepryl, Emsam, Zelapar
How Selegiline interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMonoamine Oxidase Inhibitors (maois) Major
Interaction Summary
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Read the full Mucuna Pruriens Extract + Selegiline interactionTranylcypromineParnate
How Tranylcypromine interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractMonoamine Oxidase Inhibitors (maois) Major
Interaction Summary
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Read the full Mucuna Pruriens Extract + Tranylcypromine interactionAdo-trastuzumab EmtansineKadcyla
How Ado-trastuzumab Emtansine interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, horny goat weed might increase the effects and side effects of CYP3A4 substrates.
Read the full Horny Goat Weed Extract + Ado-trastuzumab Emtansine interactionAbciximabReoPro
How Abciximab interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, horny goat weed might increase the risk of bleeding.
Read the full Horny Goat Weed Extract + Abciximab interactionAbemaciclibVerzenio
How Abemaciclib interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, horny goat weed might increase the effects and side effects of CYP3A4 substrates.
Read the full Horny Goat Weed Extract + Abemaciclib interactionAbiraterone
How Abiraterone interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, horny goat weed might increase the effects and side effects of CYP3A4 substrates.
Read the full Horny Goat Weed Extract + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, horny goat weed might increase the effects and side effects of CYP3A4 substrates.
Read the full Horny Goat Weed Extract + Abiraterone Acetate interactionAbrocitinibCibinqo
How Abrocitinib interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, horny goat weed might increase the risk of bleeding.
Read the full Horny Goat Weed Extract + Abrocitinib interactionAcalabrutinibCalquence
How Acalabrutinib interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, horny goat weed might increase the effects and side effects of CYP3A4 substrates.
Read the full Horny Goat Weed Extract + Acalabrutinib interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, concomitant use of cowhage and antidiabetes drugs might increase the risk of hypoglycemia.
Read the full Mucuna Pruriens Extract + Acarbose interactionAcebutololRhotral, Sectral
How Acebutolol interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, horny goat weed might increase the risk of hypotension.
Read the full Horny Goat Weed Extract + Acebutolol interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, horny goat weed might increase the risk of bleeding.
Read the full Horny Goat Weed Extract + Acenocoumarol interactionAcepromazineAtravet
How Acepromazine interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Mucuna Pruriens ExtractAntipsychotic Drugs Moderate
Interaction Summary
Theoretically, use of cowhage might decrease the clinical effects of antipsychotic drugs.
Read the full Mucuna Pruriens Extract + Acepromazine interactionAcetaminophenChildren's Tylenol, Children's Tylenol Meltaways, Tylenol, Tylenol Ex Strength
How Acetaminophen interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractCytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, horny goat weed might increase the effects and side effects of CYP1A2 substrates.
Read the full Horny Goat Weed Extract + Acetaminophen interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Horny Goat Weed Complex — through 1 ingredient. Tap an ingredient for the detail:
Horny Goat Weed ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Anticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, horny goat weed might increase the effects and side effects of CYP1A2 substrates.
Read the full Horny Goat Weed Extract + Acetaminophen, Aspirin interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Horny Goat Weed Complex with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.
Horny Goat Weed extract
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.
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.
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.
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.
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.
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.
Mucuna pruriens extract
Levodopa
Concomitant use can increase the risk of levodopa-related adverse effects.
Cowhage contains levodopa. Some cowhage products have been standardized to contain 75-400 mg of levodopa per dose.
Methyldopa (Aldomet)
Theoretically, concomitant use of cowhage and methyldopa might increase the risk of hypotension.
Cowhage contains levodopa. Use of levodopa with methyldopa might cause additive hypotension. In addition, methyldopa may inhibit peripheral decarboxylation of levodopa and increase levodopa levels in the central nervous system; avoid using.
Monoamine Oxidase Inhibitors (Maois)
Theoretically, concomitant use of cowhage and non-selective MAOIs might increase the risk of hypertensive crisis.
Cowhage contains levodopa. Use of levodopa with non-selective MAOIs might cause hypertensive crisis. However, this interaction has not been reported with MAO-B selective inhibitors such as selegiline.
Anesthesia
Theoretically, concomitant use of cowhage and anesthesia might increase the risk of arrhythmias.
Cowhage contains levodopa. Use of levodopa with cyclopropane or halogenated hydrocarbon anesthesia has led to arrhythmias. Other anesthetics have not been implicated. Use other anesthetics in patients taking cowhage or tell patients to stop taking cowhage at least 2 weeks before surgery.
Antidiabetes Drugs
Theoretically, concomitant use of cowhage and antidiabetes drugs might increase the risk of hypoglycemia.
Animal research shows that cowhage might have hypoglycemic effects.
Antipsychotic Drugs
Theoretically, use of cowhage might decrease the clinical effects of antipsychotic drugs.
Cowhage contains levodopa. Use of levodopa might counteract the antidopaminergic effects of antipsychotic medications.
Guanethidine (Ismelin)
Theoretically, concomitant use of cowhage and guanethidine might increase the risk of hypotension.
Cowhage contains levodopa. Use of levodopa with guanethidine might cause additive hypotension; avoid using.
Tricyclic Antidepressants (Tcas)
Theoretically, use of TCAs might reduce the levels and clinical effects of cowhage.
Cowhage contains levodopa. Use of TCAs might reduce the absorption of levodopa. Some case reports describe patients that developed hypertension and dyskinesia when taking both levodopa and TCAs.
Brand information
Manufacturer and brand details for Horny Goat Weed Complex, from the product label.
The Vitamin Shoppe
See all The Vitamin Shoppe products- Name
- Vitamin Shoppe, Inc.
- City
- Secaucus
- State
- NJ
- ZipCode
- 07094
- Phone Number
- 1-800-223-1216
- Web Address
- www.vitaminshoppe.com
Horny Goat Weed Complex by The Vitamin Shoppe: Common Questions
Does Horny Goat Weed Complex by The Vitamin Shoppe interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Will this help with sexual function?
What's in cowhage, and why does it matter?
Can I take this while pregnant?
What are the most common side effects?
Is this safe long-term?
Will this affect my blood pressure medication?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Horny Goat Weed Complex is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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.
The Full Monographs Behind Horny Goat Weed Complex’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Horny Goat Weed
Interacts with 963 drugsHorny 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 → Herb & supplement monographMaca
Maca is a nutrient-rich Andean root often used for energy, libido, and menopause symptoms. Early studies suggest it may modestly help sexual desire and some menopause symptoms, but the evide...
Read the full Maca monograph → Herb & supplement monographCowhage
Interacts with 193 drugsCowhage (Mucuna pruriens) is a tropical legume best known as a natural source of L-dopa, the compound the body turns into dopamine. It is most studied for Parkinson's disease symptoms and ma...
Read the full Cowhage monograph →Sources & How We Checked
Horny Goat Weed Complex'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.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
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 24 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
- Cirigliano MD, Szapary PO. Horny goat weed for erectile dysfunction. Alt Med Alert 2001;4:19-22.
- Partin JF, Pushkin YR. Tachyarrhythmia and hypomania with horny goat weed. Psychosomatics 2004;45:536-7. PubMed
- 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
- 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
- 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
- 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
- Ramanathan VS, Mitropoulos E, Shlopov B, et al. An Enzyte'ing' case of acute hepatitis. J Clin Gastroenterol 2011;45(9):834-5. PubMed
- 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.
- 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
- 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
- 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
Maca 1 reference
- Valerio, L. G., Jr. and Gonzales, G. F. Toxicological aspects of the South American herbs cat's claw (Uncaria tomentosa) and Maca (Lepidium meyenii) : a critical synopsis. Toxicol.Rev 2005;24(1):11-35. PubMed
Cowhage 12 references
- McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
- Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
- Anon. Epidemiological notes and reports: Mucuna pruriens-associated pruritus--New Jersey. MMWR Morb Mortal Wkly Rep 1985;34:732-3.
- HP-200 in Parkinson's Disease study group. An alternative medicine treatment for Parkinson's disease: Results of a multicenter clinical trial. J Alt Comp Med 1995;1:249-55. DOI
- Infante ME, Perez AM, Simao MR, et al. Outbreak of acute toxic psychosis attributed to Mucuna pruriens. Lancet 1990;336:1129. PubMed
- Vaidya AB, Rajagopalan TG, Mankodi NA, et al. Treatment of Parkinson's disease with the cowhage plant-Mucuna pruriens Bak. Neurol India 1978;26:171-6.
- Vadivel V, Janardhanan K. Nutritional and anti-nutritional composition of velvet bean: an under-utilized food legume in south India. Int J Food Sci Nutr 2000;51:279-87. PubMed
- Akhtar MS, Qureshi AQ, Iqbal J. Antidiabetic evaluation of Mucuna pruriens, Linn seeds. J Pak Med Assoc 1990;40:147-50.
- Prakash, D., Niranjan, A., and Tewari, S. K. Some nutritional properties of the seeds of three Mucuna species. Int.J.Food Sci.Nutr. 2001;52(1):79-82.
- Vadivel, V. and Janardhanan, K. Nutritional and antinutritional characteristics of seven South Indian wild legumes. Plant Foods Hum.Nutr 2005;60(2):69-75. PubMed
- Creapure (Creatine Monohydrate). Toxicological Datasheet. Degussa BioActives. Available at: https://www.fda.gov/ohrms/DOCKETS/.../95s-0316-rpt0154-54-Ref-50-vol112.pdf.
- Pulikkalpura H, Kurup R, Mathew PJ, Baby S. Levodopa in Mucuna pruriens and its degradation. Sci Rep 2015;5:11078. PubMed
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