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Dietary supplement

Arnica 450 mg 4:1 Extract Ingredients & Drug Interactions

by TerraVita Premium Collection

Arnica 450 mg 4:1 Extract label
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Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Arnica 450 mg 4:1 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

Arnica 450 mg 4:1 Extract is a dietary supplement by TerraVita Premium Collection with 1 active ingredient. Its ingredients are commonly taken for bruising, muscle soreness, joint pain (osteoarthritis).Based on those ingredients, 122 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Arnica 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 Arnica 450 mg 4:1 Extract by TerraVita Premium Collection

Ask about any prescription or over-the-counter medication and we check it for interactions with Arnica 450 mg 4:1 Extract by TerraVita Premium Collection — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Arnica 450 mg 4:1 Extract by TerraVita Premium Collection

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 16, 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: arnica extract, a concentrated botanical preparation at a 4:1 ratio. The capsule itself is made from gelatin and water, which are inactive ingredients that form the delivery system.

Arnica comes from the arnica plant and has been used traditionally for inflammation and bruising, though its strength in oral form (as a capsule) differs from topical creams or homeopathic dilutions you might see elsewhere.

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

This product doesn't appear to be marketed for a specific use, so we graded Arnica's overall clinical evidence instead.

Moderate

Some clinical evidence supports Arnica for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Osteoarthritis — rated "Possibly Effective" (Natural Medicines).

Arnica extract is possibly effective for osteoarthritis based on available evidence. For other uses — acne, breast cancer-related hot flashes, postoperative pain, and dry eye — the data we hold shows insufficient reliable evidence to make a rating.

If you're considering this for one of those other conditions, there isn't enough established evidence yet to say whether it'll help.

The evidence, ingredient by ingredient Arnica

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.

Here's what you need to know: oral arnica at full strength is unsafe and can cause serious toxicity, including bleeding, nausea, vomiting, high blood pressure, shortness of breath, and in rare cases arrhythmia, coma, organ failure, or death. The safety profile improves significantly in homeopathic amounts (highly diluted forms), which are generally well tolerated.

This product is a 4:1 extract — not homeopathic and not undiluted — so it falls somewhere in between. For pregnancy and breastfeeding, the safety data advises against use: there isn't enough data to know it's safe, so it's best to avoid it during pregnancy and while breastfeeding.

Talk with your doctor or pharmacist if you're pregnant, planning to become pregnant, or nursing before taking this product.

Side effects, ingredient by ingredient Arnica

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 — Arnica.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 122 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 taking this product, check with your doctor or pharmacist if you're on any blood thinners or antiplatelet drugs (such as warfarin, aspirin, clopidogrel, or other clot-preventing medications) — arnica may add to their effect. No other medication types are documented as interacting with arnica in our data, but that doesn't mean none exist; your healthcare provider can review your full medication list.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

Arnica extract at this strength is possibly effective for osteoarthritis but carries a moderate interaction risk with blood thinners and antiplatelet drugs, and serious safety concerns with oral use at full potency. If you take any blood-clotting medications, or if you're pregnant or breastfeeding, clear this with your own doctor or pharmacist before starting.

For other conditions, the evidence isn't solid enough to recommend it.

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 21, 2023.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Arnica 450 mg 4:1 Extract, straight from the product label.

Brand TerraVita Premium Collection
Barcode (UPC) 064435189976
Net contents 100 Capsule(s)
Market status On market
Date entered into DSLD Apr 21, 2023
DSLD ID 287695
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
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 Arnica 450 mg 4:1 Extract by TerraVita Premium Collection, 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:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
100
UPC/BARCODE
064435189976
IngredientAmount% DV
Arnica extract450 mg--

Other ingredients: Gelatin, Water

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.
FDA Statement of Identity

A Dietary Supplement

Brand IP Statement(s)

Copyright 2017 TerraVita - Distributed by ZooScape LLC, All Rights Reserved.

Suggested/Recommended/Usage/Directions

Directions Take 1 capsule, 3 times daily, with meals.

General Statements

TerraVita is an exclusive line of premium natural products that use the finest, purest and most potent ingredients in the world. TerraVita's hallmarks are the highest possible standards of purity, potency, stability and freshness. All products are prepared with the greatest quality control, from raw materials through the entire manufacturing process, right up to the moment your product is sealed for freshness and shipped to you.

Please recycle!

FDA Disclaimer Statement

Statements not evaluated by FDA. Product not intended to diagnose, treat, cure, or prevent any disease.

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

See for yourself

Arnica 450 mg 4:1 Extract by TerraVita Premium Collection label

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

Arnica 450 mg 4:1 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 Arnica 450 mg 4:1 Extract by TerraVita Premium Collection

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

Serving size1 Capsule(s) Dosage formCapsule Servings per container100 Amounts shown are per serving.

Arnica extract

Interacts with
122 drugs
450 mg per serving

Arnica is a daisy-family plant used mainly in topical and homeopathic products for bruising, muscle soreness, and pain. The evidence is mixed and most...

Arnica extract monograph & interactions

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

Interaction report

Arnica 450 mg 4:1 Extract by TerraVita Premium Collection Drug Interactions

Want to check YOUR meds against Arnica 450 mg 4:1 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
122Drugs
122 Moderate

Ingredients driving the most interactions

Arnica extract 122

Individual Drug Interactions

The ingredients in Arnica 450 mg 4:1 Extract interact with 122 drugs. Click any drug to see the details.

1 of the 1 ingredient in Arnica 450 mg 4:1 Extract interact with drugs. Each result below shows which ingredient is responsible. Arnica extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Arnica 450 mg 4:1 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.

Arnica extract1 drug type · 122 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, arnica might have additive effects with anticoagulant and antiplatelet drugs. Homeopathic arnica preparations are unlikely to have this interaction.
In vitro evidence shows that sesquiterpene lactones in arnica flowers can decrease platelet aggregation. However, this effect has not been reported in humans.

Likelihood Unlikely Evidence D
Arnica extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Arnica 450 mg 4:1 Extract, from the product label.

TerraVita Premium Collection

See all TerraVita Premium Collection products
Name
TerraVita Fine Whole Herbs
City
Brampton
State
Ontario
Pharmacist Counseling Corner

Arnica 450 mg 4:1 Extract by TerraVita Premium Collection: Common Questions

Does Arnica 450 mg 4:1 Extract by TerraVita Premium Collection interact with any medications?
Yes. Based on its ingredients, Arnica 450 mg 4:1 Extract has a known interaction with 122 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Arnica 450 mg 4:1 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.
Is this safe to take if I'm pregnant or breastfeeding?
No — the safety data advises against it during pregnancy and while breastfeeding because there isn't enough information. Talk with your doctor or pharmacist about whether this is right for you in either situation.
What are the most common side effects of oral arnica at this dose?
At full oral strength, arnica can cause nausea, vomiting, stomach pain, diarrhea, headache, drowsiness, and nervousness. In homeopathic dilutions it's much better tolerated, but this is a 4:1 extract, not a homeopathic form.
Does this actually work for osteoarthritis?
Arnica extract is possibly effective for osteoarthritis based on available evidence, meaning there's some support for it but it's not definitive. For other uses like acne, hot flashes, or pain after surgery, we don't have enough reliable evidence to say.
Can I take this with my blood thinner medication?
That's a question for your own doctor or pharmacist — arnica may have additive effects with blood thinners and antiplatelet drugs, which is a Moderate severity interaction. Your provider needs to weigh the risk for your specific situation.
What's the difference between this extract and the homeopathic arnica I see in stores?
This is a 4:1 extract, meaning it's more concentrated than a homeopathic form. Homeopathic arnica is heavily diluted and generally very well tolerated; this product is stronger and carries higher risk of the side effects listed here.

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.

Arnica 450 mg 4:1 Extract label
Go deeper

The Full Monographs Behind Arnica 450 mg 4:1 Extract’s Ingredients

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

Herb & supplement monograph

Arnica

Interacts with 122 drugs

Arnica is a daisy-family plant used mainly in topical and homeopathic products for bruising, muscle soreness, and pain. The evidence is mixed and mostly weak, and undiluted arnica taken by m...

Read the full Arnica monograph →
Sources

Sources & How We Checked

Arnica 450 mg 4:1 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 10 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.

Arnica 10 references
  1. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
  2. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  3. Schroder H, Losche W, Strobach H, et al. Helenalin and 11 alpha, 13-dihydrohelenalin, two constituents from Arnica montana L., inhibit human platelet function via thiol-dependent pathways. Thromb Res 1990;57:839-45.
  4. Adkison JD, Bauer DW, Chang T. The effect of topical arnica on muscle pain. Ann Pharmacother 2010;44:1579-84. PubMed
  5. No authors listed. Final report on the safety assessment of Arnica montana extract and Arnica montana. Int.J.Toxicol. 2001;20:1-11. DOI
  6. Karow JH, Abt HP, Frohling M, and Ackermann H. Efficacy of Arnica montana D4 for healing of wounds after Hallux valgus surgery compared to diclofenac. J Altern Complement Med 2008;14:17-25.
  7. Venkatramani DV, Goel S, Ratra V, et al. Toxic optic neuropathy following ingestion of homeopathic medication Arnica-30. Cutan.Ocul.Toxicol. 2013;32:95-97. PubMed
  8. Moghadam BK, Gier R, and Thurlow T. Extensive oral mucosal ulcerations caused by misuse of a commercial mouthwash. Cutis 1999;64:131-134.
  9. Stevinson C, Devaraj VS, Fountain-Barber A, et al. Homeopathic arnica for prevention of pain and bruising: randomized placebo-controlled trial in hand surgery. J R Soc Med 2003;96:60-65. PubMed
  10. Canders CP, Stanford SR, Chiem AT. A dangerous cup of tea. Wilderness Environ Med. 2014 Mar;25(1):111-2. PubMed

See these in context on the Arnica 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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