# Plant Monograph: Devil's Claw
**Name of plant:**
Devil's Claw
**Catch phrase (Carmina Gadelica or traditional invocation if available):**
No Carmina Gadelica invocation is associated with Devil's Claw. The plant's striking hooked fruits inspired its English common name; in southern African traditional medicine, it was valued as a bitter healing root.
**Family:**
Pedaliaceae
**Genus and species:**
*Harpagophytum procumbens* (Burch.) DC. ex Meisn.
**Other names:**
* Devil's claw
* Grapple plant
* Wood spider
* Harpagophytum
* Devil's claw root
* Devil's claw tuber
* Afrikaans: *Duiwelsklou*
* German: Teufelskralle
* French: Griffe du diable
**Brief introduction:**
Devil's Claw is a distinctive perennial herb native to the dry regions of southern Africa, particularly Namibia, Botswana, South Africa, and surrounding areas. Its trailing stems produce attractive tubular flowers and unusual woody fruits covered with long, curved hooks. The secondary storage roots, commonly called tubers, are the principal medicinal material.
The plant has a long history in southern African traditional medicine, where preparations of the roots were used internally for pain, digestive complaints, fever, and general rheumatic conditions. In modern Western herbal medicine, Devil's Claw is best known as an anti-inflammatory and analgesic herb used particularly for osteoarthritis and lower-back pain.
**Traditional uses:**
* Treatment of rheumatic and joint pain
* Relief of muscular aches and general bodily pain
* Digestive bitter and appetite stimulant
* Traditional remedy for fever
* Treatment of various inflammatory and gastrointestinal complaints
**Historical use:**
* Indigenous peoples of southern Africa used preparations of the secondary roots medicinally
* Infusions and decoctions were traditionally used for rheumatic and arthritic complaints
* Bitter root preparations were used to stimulate digestion and appetite
* European settlers and physicians adopted Devil's Claw into herbal medicine during the 20th century
* German herbal medicine subsequently developed standardized Devil's Claw preparations for musculoskeletal pain
**Parts used and method of use:**
* Secondary storage roots/tubers
* Dried root extracts
Used as:
* Decoction of dried root
* Powdered dried root
* Hydroalcoholic or aqueous extract
* Standardized tablets or capsules containing harpagoside
**Use in healing (modern herbal practice):**
* Supportive treatment of osteoarthritis pain
* Relief of chronic lower-back pain
* Traditional treatment of rheumatic and muscular pain
* Anti-inflammatory herbal support
* Digestive bitter for reduced appetite and sluggish digestion
**Pharmacology and biochemistry:**
* Iridoid glycosides, particularly harpagoside
* Harpagide
* Phenylpropanoid glycosides and flavonoids
Mechanisms:
* Harpagoside and related constituents appear to modulate inflammatory signaling pathways
* Experimental studies suggest inhibition of inflammatory mediators and enzymes involved in inflammatory responses
* Bitter constituents may stimulate gastric secretions and contribute to digestive activity
Overall profile: Devil's Claw is primarily an anti-inflammatory and analgesic botanical. Human clinical research provides moderate evidence for symptomatic relief of certain forms of osteoarthritis and lower-back pain, although results vary among preparations and studies. Its most important pharmacologically active marker compound is generally considered to be harpagoside.
**Common dosage:**
* Dried root: approximately 2–5 g daily, usually divided into several doses
* Powdered root: approximately 1.5–3 g per day
* Dry extract standardized to harpagoside: commonly 600–1,200 mg daily, depending on extract concentration
* Extract standardized to approximately 50–100 mg harpagoside daily: used in clinical herbal preparations
**Safety factors (including side effects):**
* Common adverse effects include nausea, diarrhea, abdominal discomfort, and headache
* Because it is strongly bitter, Devil's Claw may increase gastric secretions and aggravate acid-related digestive problems
* Avoid medicinal use with active gastric or duodenal ulcers and use caution with gallstones or biliary obstruction
* Individuals with allergies to the plant or its constituents should discontinue use if a reaction develops
* Long-term continuous use has been less extensively studied than short- to medium-term therapeutic use
**First aid / adverse reaction response:**
* Nausea, abdominal pain, or diarrhea: Discontinue use; seek medical advice if symptoms are severe or persistent
* Worsening heartburn or ulcer symptoms: Stop use and seek medical assessment
* Dizziness or unusual weakness: Discontinue use and obtain medical advice if symptoms persist
* Facial swelling, difficulty breathing, or severe allergic reaction: Seek emergency medical attention immediately
**Drug interactions:**
* May theoretically increase the effects of anticoagulant or antiplatelet medications
* May interact with medications affecting blood pressure because of possible cardiovascular effects
* May affect blood glucose and should be used cautiously with glucose-lowering medications
* General interaction considerations: Use medicinal Devil's Claw cautiously with prescription medicines, particularly anticoagulants, antiplatelet agents, antidiabetic drugs, antihypertensives, and medicines affected by gastric secretion
**Horticultural requirements:**
* USDA / Canadian zone: USDA Zones 9–11; generally unsuitable for year-round outdoor cultivation in most of Canada
* Soil pH: Approximately 6.0–7.5
* Light requirements: Full sun
* Moisture: Dry to very dry; excellent drainage is essential
* Other notes (growth habit, harvest timing, etc.):
* Low-growing, trailing perennial adapted to arid and semi-arid environments
* Produces funnel-shaped flowers followed by characteristic hooked fruits
* Medicinal secondary roots are harvested after sufficient root development, generally from mature plants
* Native to sandy and rocky soils of the Kalahari and surrounding dry regions of southern Africa
* Propagation is primarily by seed; germination can be slow and irregular, and cultivation requires warmth, strong light, and very well-drained soil
**Sampling of clinical reports / studies:**
* Randomized controlled trials have investigated Devil's Claw extracts for chronic lower-back pain, with several reporting modest reductions in pain compared with placebo
* Clinical studies and systematic reviews have found evidence suggesting benefit for osteoarthritis pain, particularly when standardized extracts are used
* Pharmacological research has investigated harpagoside and related iridoid glycosides for anti-inflammatory and analgesic activity
* Ethnobotanical evidence establishes longstanding medicinal use among Indigenous peoples of southern Africa, particularly for musculoskeletal pain and digestive complaints
* Overall assessment of evidence: Devil's Claw has substantially stronger human clinical evidence than many traditional medicinal plants, particularly for osteoarthritis and lower-back pain; however, benefits appear symptomatic rather than curative, and evidence depends heavily on the specific standardized extract used.
Educational Use Only: The information presented on this page is provided for educational, historical, and informational purposes only. ArdNemeton na Tuatha and Bhùth Draoi do not provide medical advice. Always consult your physician and pharmacist before using any herb, mushroom, supplement, or botanical product for medicinal purposes. Traditional uses described herein do not constitute medical claims.