Interactions on record — worth a quick check against your medications. Based on 1 of 2 ingredients. Check your meds →
Dietary supplement

Devil's Claw Max-V Ingredients & Drug Interactions

by Douglas Laboratories

Devil's Claw Max-V label
See full label image
Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Devil's Claw Max-V 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 Max-V is a dietary supplement by Douglas Laboratories with 2 active ingredients. 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 Devil's Claw herbal 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 Max-V by Douglas Laboratories

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

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HelloPharmacist Scorecard of Devil's Claw Max-V by Douglas Laboratories

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 23, 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 2 of its 2 active ingredients.
  • “Devil's Claw herbal extract” is listed as a grouped ingredient — the label gives one combined amount (200 mg) without saying how much of each component you get.

Devil's Claw Max-V contains 2 active ingredients: devil's claw herbal extract and harpagoside. Devil's claw is a plant traditionally used for joint and back discomfort; harpagoside is a compound found in devil's claw thought to contribute to its effects.

The capsule also contains cellulose and vegetable stearate as inactive ingredients.

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: Osteoarthritis, Back pain, Myalgia, Tendinopathy, Rheumatoid arthritis (RA), Joint stiffness — and 1 related terms.
  • 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 Fibromyalgia, Myalgia, Rheumatoid arthritis (RA), Tendinopathy.

Devil's claw is rated possibly effective for back pain and osteoarthritis based on available evidence. For atherosclerosis, the evidence isn't established in the data we hold.

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, though it can cause digestive upset — the most common side effects are allergic skin reactions, diarrhea, and indigestion. Some people report headache, dizziness, or loss of taste, though it's unclear whether devil's claw caused these.

Rarely, gastrointestinal bleeding has been reported, especially at high doses. Avoid this product during pregnancy — the safety data advises against it because it may affect the uterus.

Do not take it while breastfeeding because there isn't enough safety information. Talk with your doctor or pharmacist if you're pregnant, planning pregnancy, or breastfeeding.

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 with your doctor or pharmacist if you take blood thinners like warfarin, medications metabolized by liver enzymes (CYP2C19, CYP2C9, CYP3A4), drugs transported by P-glycoprotein, or acid-reflux medications (H2-blockers or proton pump inhibitors). The interaction with blood thinners is the most serious concern.

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 Max-V may help with back pain or osteoarthritis, but it interacts with a significant number of medications — especially blood thinners, liver-enzyme substrates, and acid-reflux drugs. If you take any regular prescription medication, check your list with your doctor or pharmacist before starting.

Avoid it during pregnancy and breastfeeding.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jun 25, 2012.

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 Max-V, straight from the product label.

Brand Douglas Laboratories
Barcode (UPC) 310539008997
Net contents 60 Vegetarian Capsule(s)
Market status On market
Date entered into DSLD Jun 25, 2012
DSLD ID 9559
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other
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 Devil's Claw Max-V by Douglas Laboratories, 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 Vegetarian Capsule(s)
Maximum serving Sizes:
1 Vegetarian Capsule(s)
Servings per container
60
UPC/BARCODE
310539008997
IngredientAmount% DV
Devil's Claw herbal extract200 mg--
Harpagoside10 mg--
Devil's Claw100 mg--

Other ingredients: Cellulose, Vegetable Stearate

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.
General Statements

The Devil's Claw (Harpagophytum procumbens DC.ex Meisn) root (tuber) contains the iridoid glycosides harpagoside, harpagide and procumbine, plus beta sitosterol, sugars and gum resin. This high potency extract is standardized at 5% harpagoside.

Suggested/Recommended/Usage/Directions

Suggested Usage: As a dietary supplement, adults take 1 capsule daily between meals, or as advised by your healthcare professional. If digestive irritation occurs, stop using.

Precautions

Stop use and consult your health care professional if allergic reactions occur.

Cautions: Avoid if you have gastric or duodenal ulcers.

Avoid if you are pregnant, as it may stimulate uterine muscle contractions. If you are nursing, or if you have gallstones, consult your health care professional before using.

KEEP OUT OF REACH OF CHILDREN.

Tamper resistant package, do not use if outer seal is missing.

Storage

For optimal storage conditions, store in a cool, dry place. (59(0)-77(0)F/15(0)-25(0)C) (35-65% relative humidity)

General

Formula #77316

FDA Statement of Identity

Standardized Herbal Extract

Formula

Standardized Herbal Extract 5% harpagoside

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

See for yourself

Devil's Claw Max-V by Douglas Laboratories label

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

Devil's Claw Max-V 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 Max-V by Douglas Laboratories

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Vegetarian Capsule(s) Dosage formCapsule Servings per container60 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.

Devil's Claw herbal extract

Interacts with
804 drugs
200 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....

Devil's Claw herbal extract monograph & interactions
  • › Harpagoside

Devil's Claw

Interacts with
804 drugs
100 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....

Devil's Claw monograph & interactions

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

Interaction report

Devil's Claw Max-V by Douglas Laboratories Drug Interactions

Want to check YOUR meds against Devil's Claw Max-V?

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

Devil's Claw herbal extract 804

Individual Drug Interactions

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

1 of the 2 ingredients in Devil's Claw Max-V interact with drugs. Each result below shows which ingredient is responsible. Devil's Claw herbal extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Devil's Claw Max-V 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.

Devil's Claw herbal 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
Devil's Claw herbal extract full monograph & interactions
The maker

Brand information

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

Douglas Laboratories

See all Douglas Laboratories products
Name
Douglas Laboratories
Street Address
600 Boyce Road
City
Pittsburgh
State
PA
ZipCode
15205
Phone Number
1.800.245.4440
Web Address
www.douglaslabs.com
Pharmacist Counseling Corner

Devil's Claw Max-V by Douglas Laboratories: Common Questions

Does Devil's Claw Max-V by Douglas Laboratories interact with any medications?
Yes. Based on its ingredients, Devil's Claw Max-V 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 Max-V contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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.
Can I take Devil's Claw Max-V if I'm pregnant or breastfeeding?
No — the safety data advises against it during pregnancy because it may affect the uterus, and there isn't enough safety information for breastfeeding. Talk with your doctor or pharmacist about whether this product is right for you.
What are the most common side effects?
Allergic skin reactions, diarrhea, and indigestion are most common. Some people also report headache, dizziness, or changes in taste. Gastrointestinal bleeding is rare but has been reported, especially at high doses.
Does devil's claw actually work for back pain?
The evidence suggests it may help — it's rated possibly effective for back pain and osteoarthritis — but the data isn't conclusive. Results vary from person to person.
What's the difference between devil's claw extract and harpagoside in this product?
Devil's claw is the whole plant extract, while harpagoside is a specific active compound found inside it. Both are included in this formula to support its effects, though we hold no interaction data for harpagoside on its own.
Can I take this long-term?
The safety data applies to short-term use in healthy adults. If you're thinking about long-term use, talk with your doctor or pharmacist first.

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 Max-V label
Go deeper

The Full Monographs Behind Devil's Claw Max-V’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 Max-V'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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