Devil's Claw
Harpagophytum procumbens
A southern African plant whose root is used for osteoarthritis and lower back pain. Its iridoid glycoside harpagoside has anti-inflammatory effects with moderate clinical support.
What is Devil's Claw?
Devil's claw (Harpagophytum procumbens) is a plant native to the Kalahari and savannahs of southern Africa, named for the tiny hooks on its fruit. Its tuberous secondary roots have a long history of use in African traditional medicine for pain and digestive complaints and are now a popular European herbal remedy for arthritis and back pain.
Known Health Benefits
How It Works
Devil's claw's anti-inflammatory and analgesic effects are attributed mainly to harpagoside and related iridoid glycosides, which suppress pro-inflammatory mediators by inhibiting COX-2 and lipoxygenase pathways and reducing cytokines such as TNF-α and IL-1β and the production of nitric oxide. Unlike NSAIDs, it does not strongly inhibit COX-1, which may explain its relatively gentle gastrointestinal profile, though it can still increase stomach acid in some people.
What Research Says
Several randomized trials and systematic reviews support devil's claw for musculoskeletal pain. Reviews (including Cochrane analyses of herbal medicine for low back pain) found moderate evidence that devil's claw extracts standardized to at least 50 mg harpagoside per day reduce low back pain better than placebo, with some trials comparable to conventional analgesics. For osteoarthritis of the hip and knee, trials report reduced pain and improved function. Study quality varies, placing it in the moderate evidence tier.
Active Compounds
Harpagoside, harpagide, iridoid glycosides, phytosterols
Forms & Bioavailability
Harpagoside is absorbed orally; standardized extracts are dosed to deliver a consistent amount (commonly 50–100 mg/day). Because stomach acid may degrade some glycosides, enteric or standardized preparations are preferred over crude powder for reliable effects.
Dosage Guidance
| Use Case | Dosage |
|---|---|
| Osteoarthritis | Extract with 50–100 mg harpagoside daily |
| Low back pain | ≥50 mg harpagoside daily |
Always consult a healthcare provider for personalized dosing.
Potential Side Effects
Most commonly mild digestive upset. May increase stomach acid, so caution with ulcers.
Who Should Avoid It
- Active stomach or duodenal ulcers (may increase acid)
- Gallstones (stimulates bile)
- Pregnancy (may stimulate the uterus)
- Anticoagulant therapy without guidance
Pregnancy & Lactation
Not recommended during pregnancy due to possible uterine-stimulating (oxytocic) effects, and insufficient data during breastfeeding.
Known Drug Interactions
May add to anticoagulants and antiplatelet drugs, affect blood sugar, and interact with medications metabolized by CYP enzymes. May reduce the effect of acid-reducing drugs.
Evidence Classification
Supported by cohort studies, case-control studies, or multiple observational studies with consistent findings.
Frequently Asked Questions
Is devil's claw good for arthritis?
Yes — it has moderate clinical evidence for reducing pain and improving function in osteoarthritis of the hip and knee, and for lower back pain. It works through anti-inflammatory compounds (harpagosides) and is often used as a gentler alternative or adjunct to NSAIDs.
How long does devil's claw take to work?
Most studies show meaningful pain relief after 2 to 4 weeks of consistent use at a dose providing at least 50 mg of harpagoside per day. It is not a fast-acting painkiller for acute flares.
Is devil's claw safer than NSAIDs for the stomach?
It tends to be gentler on the stomach than traditional NSAIDs because it doesn't strongly block COX-1, but it can still increase stomach acid and isn't suitable for people with active ulcers. Anyone on blood thinners or with ulcers should check with a clinician.
References
- Herbal medicine for low back pain: a Cochrane review. Gagnier JJ, Oltean H, van Tulder MW, et al.. Cochrane Database Syst Rev / Spine (2016)View study
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