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Dietary supplement

Devil's Claw Ingredients & Drug Interactions

by Herbal Terra

Devil's Claw label
See full label image
Liquid Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Devil's Claw 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

Devil's Claw is a dietary supplement by Herbal Terra with 1 active ingredient. Its ingredients are commonly taken for osteoarthritis pain, lower back pain, joint pain and stiffness.Based on those ingredients, 804 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are certfied organic Devil's Claw (Harpagophytum procumbens) sun dried tuber liquid 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 Devil's Claw by Herbal Terra

Ask about any prescription or over-the-counter medication and we check it for interactions with Devil's Claw by Herbal Terra — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Devil's Claw by Herbal Terra

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: certified organic Devil's Claw (Harpagophytum procumbens) sun-dried tuber liquid extract. It also includes menstruum, an inactive ingredient used in liquid extracts to pull out and carry the active compounds.

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: joint pain and inflammation support.
  • We looked for evidence on: Back pain, Osteoarthritis, Rheumatoid arthritis (RA), Tendinopathy, General joint stiffness, Musculoskeletal inflammation.
  • The strongest evidence on file: Devil's Claw is rated "Possibly Effective" for Back pain (Natural Medicines).
  • Also on file: Devil's Claw is rated "Possibly Effective" for Osteoarthritis.
  • Also on file: Devil's Claw is rated "Insufficient Reliable Evidence To Rate" for Rheumatoid arthritis (RA), Tendinopathy.

Devil's Claw is rated possibly effective for both back pain and osteoarthritis based on the evidence we have. For atherosclerosis, there isn't enough reliable evidence to rate it one way or the other.

If you're considering this for pain or joint symptoms, talk with your doctor or pharmacist about whether it fits your situation.

The evidence, ingredient by ingredient Devil's Claw

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.

Devil's Claw is generally well tolerated for short-term use in healthy adults, but digestive upset is common — some trial participants reported diarrhea, indigestion, and loss of appetite, especially at higher doses. Rarely, gastrointestinal bleeding has been reported, and a small number of people have experienced headache, dizziness, or sleep problems, though it's unclear if devil's claw caused these.

Avoid this product during pregnancy because it may affect the uterus and safety hasn't been established. Also avoid it while breastfeeding due to lack of safety information.

Side effects, ingredient by ingredient Devil's Claw

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 — Devil's Claw.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 805 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, double-check warfarin or other blood thinners with your pharmacist. Also ask about any medications that your liver breaks down (CYP2C19, CYP2C9, or CYP3A4 substrates), drugs that rely on a cellular pump called P-glycoprotein, and stomach-acid reducers like H2-blockers or proton pump inhibitors — devil's claw may theoretically affect all of these.

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.

Devil's Claw may help with back pain or osteoarthritis, but it can trigger stomach upset and interacts with quite a few medications — especially blood thinners like warfarin and drugs your liver processes. If you're on any prescription medication, check it with your pharmacist or our tool below before you start.

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 Sep 25, 2020.

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 Devil's Claw, straight from the product label.

Brand Herbal Terra
Barcode (UPC) 7429523888804
Net contents 4 Fluid Ounce(s); 120 mL
Market status On market
Date entered into DSLD Sep 25, 2020
DSLD ID 234675
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Organic, 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 Devil's Claw by Herbal Terra, 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 mL
Maximum serving Sizes:
1 mL
Servings per container
120
UPC/BARCODE
7429523888804
IngredientAmount% DV
certfied organic Devil's Claw (Harpagophytum procumbens) sun dried tuber liquid extract970 mg--

Other ingredients: Menstruum

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.
Formulation

Origin of plant material: Namibia.

Manufactured in the USA in an FDA registered facility

Alcohol free

Dried herb/menstruum ratio: 1:3 Expertly extracted Laboratory tested 330 mg/1 mL Premium product Alcohol-free liquid herbal extract

Non GMO

No artificial ingredients, GMO, gluten, color additives, fillers, preservatives or binders. Natural Gluten Free

Suggested/Recommended/Usage/Directions

Direction Shake well before use. Adults take up to 30 drops (1 mL, one full squeeze of the dropper bulb) in 3-4 fl. oz of juice or water up to 4 times a day. We recommend to seek expert medical advice before taking this or any other herbal supplements.

FDA Disclaimer Statement

Notice This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure, or prevent any disease.

Precautions

Caution May have contraindications.

Do not use if you are allergic to any ingredients.

Consult a physician before using during pregnancy, if nursing, or if you are on any medications.

Keep out of the reach of children.

Storage

Store in a cool, dry, dark place.

Formula

Harpagophytum procumbens

FDA Statement of Identity

Herbal Supplement

Seals/Symbols

Made in USA Made in an FDA registered facility Natural Gluten Free

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

See for yourself

Devil's Claw by Herbal Terra label

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

Devil's Claw 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 Devil's Claw by Herbal Terra

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

Serving size1 mL Dosage formLiquid Servings per container120 Amounts shown are per serving.

Certfied organic Devil's Claw (Harpagophytum procumbens) sun dried tuber liquid extract

Interacts with
804 drugs
970 mg per serving

Devil's claw is a southern African plant used mainly for arthritis and back pain, and some studies suggest it may help ease these types of discomfort....

Certfied organic Devil's Claw (Harpagophytum procumbens) sun dried tuber liquid extract monograph & interactions

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

Interaction report

Devil's Claw by Herbal Terra Drug Interactions

Want to check YOUR meds against Devil's Claw?

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
804Drugs
731 Moderate 73 Minor

Ingredients driving the most interactions

certfied organic Devil's Claw (Harpagophytum procumbens) sun dried tuber liquid extract 804

Individual Drug Interactions

The ingredients in Devil's Claw interact with 804 drugs. Click any drug to see the details.

1 of the 1 ingredient in Devil's Claw interact with drugs. Each result below shows which ingredient is responsible. certfied organic Devil's Claw (Harpagophytum procumbens) sun dried tuber liquid extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Devil's Claw 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.

certfied organic Devil's Claw (Harpagophytum procumbens) sun dried tuber liquid extract7 drug types · 804 drugs

Cytochrome P450 2C19 (Cyp2C19) Substrates

Theoretically, devil's claw might increase levels of drugs metabolized by CYP2C19.
In vitro research shows that devil's claw might inhibit CYP2C19, although this has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2C9 (Cyp2C9) Substrates

Theoretically, devil's claw might increase levels of drugs metabolized by CYP2C9.
In vitro research shows that devil's claw might inhibit CYP2C9, although this has not been reported in humans.

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

Theoretically, devil's claw might increase levels of drugs metabolized by CYP3A4.
In vitro research shows that devil's claw might inhibit CYP3A4, although this has not been reported in humans.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Theoretically, Devil's claw might increase the activity of warfarin.
In one case report, purpura occurred in a patient taking warfarin and devil's claw concurrently. This might indicate over-anticoagulation. It is unclear if this was due to Devil's claw or other contributing factors.

Likelihood Possible Evidence D
H2-Blockers

Theoretically, devil's claw might decrease the effectiveness of H2-blockers.
Devil's claw has been reported to increase stomach acid, which might interfere with the effects of H2-blockers.

Likelihood Possible Evidence D
P-Glycoprotein Substrates

Theoretically, devil's claw might increase levels of P-glycoprotein substrates.
In vitro research shows that devil's claw inhibits P-glycoprotein, which transports many drugs out of cells. This might increase intracellular levels of P-glycoprotein substrates, although it is unclear if this effect would be clinically important.

Likelihood Possible Evidence D
Proton Pump Inhibitors (Ppis)

Theoretically, devil's claw might decrease the effectiveness of PPIs.
Devil's claw has been reported to increase stomach acid, which might interfere with the effects of PPIs.

Likelihood Possible Evidence D
certfied organic Devil's Claw (Harpagophytum procumbens) sun dried tuber liquid extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Devil's Claw, from the product label.

Herbal Terra

See all Herbal Terra products
Name
Herbal Terra
Pharmacist Counseling Corner

Devil's Claw by Herbal Terra: Common Questions

Does Devil's Claw by Herbal Terra interact with any medications?
Yes. Based on its ingredients, Devil's Claw has a known interaction with 804 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Devil's Claw 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 Devil's Claw upset my stomach?
Digestive side effects are the most common issue — diarrhea, indigestion, and loss of appetite show up in some people taking it, especially at higher doses. A small number of trial participants also reported stomach ulcers or bleeding, though this is rare. If you have a sensitive stomach, start with a low dose and watch how you feel.
Can I take this while pregnant or breastfeeding?
No. Avoid Devil's Claw during pregnancy because it may affect the uterus and safety hasn't been established. Also avoid it while breastfeeding — there isn't enough safety information. Talk with your doctor or midwife about alternatives if you're looking for pain relief during this time.
Does Devil's Claw actually work for back pain?
It's rated possibly effective for back pain based on the evidence we have, so some people do seem to benefit. That said, the proof isn't airtight. If you're thinking of trying it, give it a fair trial — a few weeks — and see whether your pain improves.
What is Devil's Claw supposed to do?
Devil's Claw is used to help with back pain and osteoarthritis. It comes from the tuber (root) of the plant and is traditionally used in South Africa. The idea is that it may help reduce inflammation and ease joint or muscle pain.
Can Devil's Claw cause headaches or dizziness?
It's rare, but yes — a small number of people in trials reported headaches, dizziness, or sleep problems while taking it. One person stopped after 4 days because of a throbbing headache and ringing in the ears. We can't say for certain devil's claw caused these, but it's something to watch for.

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.

Devil's Claw label
Go deeper

The Full Monographs Behind Devil's Claw’s Ingredients

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

Herb & supplement monograph

Devil's Claw

Interacts with 804 drugs

Devil's claw is a southern African plant used mainly for arthritis and back pain, and some studies suggest it may help ease these types of discomfort. The evidence is moderate at best, and p...

Read the full Devil's Claw monograph →
Sources

Sources & How We Checked

Devil's Claw'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 18 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.

Devil's Claw 18 references
  1. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  2. Shaw D, Leon C, Kolev S, Murray V. Traditional remedies and food supplements: a 5-year toxicological study (1991-1995). Drug Saf 1997;17:342-56.
  3. Chantre P, Cappelaere A, Leblan D, et al. Efficacy and tolerance or Harpagophytum procumbens versus diacerhein in treatment of osteoarthritis. Phytomedicine 2000;7:177-83.
  4. Chrubasik S, Thanner J, Kunzel O, et al. Comparison of outcome measures during treatment with the proprietary Harpagophytum extract doloteffin in patients with pain in the lower back, knee or hip. Phytomedicine 2002;9:181-94. PubMed
  5. Circosta C, Occhiuto F, Ragusa S, et al. A drug used in traditional medicine: Harpagophytum procumbens DC. II. Cardiovascular activity. J Ethnopharmacol 1984;11:259-74. PubMed
  6. Grahame R, Robinson BV. Devils's claw (Harpagophytum procumbens): pharmacological and clinical studies. Ann Rheum Dis 1981;40:632. PubMed
  7. Unger M, Frank A. Simultaneous determination of the inhibitory potency of herbal extracts on the activity of six major cytochrome P450 enzymes using liquid chromatography/mass spectrometry and automated online extraction. Rapid Commun Mass Spectrom 2004;1 PubMed
  8. Wegener T, Lupke NP. Treatment of patients with arthrosis of hip or knee with an aqueous extract of devil's claw (Harpagophytum procumbens DC). Phytother Res 2003;17:1165-72.
  9. Chrubasik S, Kunzel O, Thanner J, et al. A 1-year follow-up after a pilot study with Doloteffin for low back pain. Phytomedicine 2005;12:1-9. PubMed
  10. Romiti N, Tramonti G, Corti A, Chieli E. Effects of Devil's Claw (Harpagophytum procumbens) on the multidrug transporter ABCB1/P-glycoprotein. Phytomedicine 2009;16:1095-100. PubMed
  11. Chrubasik, S., Junck, H., Breitschwerdt, H., Conradt, C., and Zappe, H. Effectiveness of Harpagophytum extract WS 1531 in the treatment of exacerbation of low back pain: a randomized, placebo-controlled, double- blind study. Eur.J Anaesthesiol. 1999;16(2 DOI
  12. Laudahn, D. and Walper, A. Efficacy and tolerance of Harpagophytum extract LI 174 in patients with chronic non-radicular back pain. Phytother.Res. 2001;15(7):621-624.
  13. Belaiche P. Etude clinique de 630 cas d'artrose traites par le nebulisat aqueux d'Harpagophytum procumbens (Radix). Phytotherapy 1982;1:22-28.
  14. Chrubasik S, Model A, Black A, and et al. A randomized double-blind pilot study comparing Doloteffin® and Vioxx® in the treatment of low back pain. Rheumatology 2003;42:141-148.
  15. Cuspidi C, Sala C, Tadic M, et al. Systemic hypertension induced by Harpagophytum procumbens (devil's claw): a case report. J Clin Hypertens (Greenwich) 2015;17(11):908-10.
  16. Mahomed IM, Ojewole JAO. Oxytocin-like effect of Harpagophytum procumbens [Pedaliacae] secondary root aqueous extract on rat isolated uterus. Afr J Trad CAM 2006;3(1):82-89.
  17. Carvalho RR, Donadel CD, Cortez AF, Valviesse VR, Vianna PF, Correa BB. J Bras Nefrol. 2017 Mar;39(1):79-81.
  18. Anon. Devil's claw root: ulcers and gastrointestinal bleeding. Prescrire Int 2013;22(144):296.

See these in context on the Devil's Claw 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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