Devil's Claw (Harpagophytum procumbens)
Overview
Devil’s claw (Harpagophytum procumbens) is a trailing perennial native to southern Africa, named for its hooked, woody fruits. For millennia, indigenous peoples have relied on its tuber to treat pain, fever, and digestive ailments. In modern herbalism, devil’s claw is best known for its anti-inflammatory and analgesic properties, frequently employed to support joint health and reduce arthritic or lower back pain. It also acts as a bitter tonic to stimulate digestion.
Traditional uses & properties
Analgesic & Anti-inflammatory: Alleviates pain and stiffness in arthritis, gout, and muscle aches. Bitter Digestive Stimulant: Encourages gastric secretions, potentially aiding poor digestion but best avoided if ulcers are present. Cooling & Drying: Reduces heat, swelling, and dampness (in the sense of traditional energetics).
Preparations & dosage
500–1,000 mg, 2–3 times daily
Dried root (1:5, 25% alcohol); 1–2 ml (0.2–0.4 tsp.) 3 times daily
Safety & precautions
Gastric/Duodenal Ulcers: Not advised if you have active peptic ulcers. Gallstones or Pregnancy: Use cautiously under professional guidance; devil’s claw may stimulate digestive secretions and uterine activity.
Drug & food interactions
Limited evidence is available. Devil’s claw does not appear to affect blood pressure, and its theoretical interaction with drugs with antiplatelet effects seems unlikely to be of practical relevance; however, it may increase the anticoagulant effects of drugs such as warfarin.
No interactions found.
Devil’s claw does not appear to affect blood pressure and is therefore unlikely to interact with antihypertensives to a clinically relevant extent, although further study is needed to confirm this. In a randomised, placebo-controlled, 4-week study,1 a Devil’s claw extract was studied for the possible treatment of low back pain in 109 patients. One patient had an episode of tachycardia while on holiday, and stopped taking the herbal medicine. When he returned from holiday, Devil’s claw was restarted and was well tolerated. It was suggested that this adverse event was due to the change in climate rather than the medication. Furthermore, in the study, there was no significant change in systolic and diastolic blood pressure or heart rate between the beginning and the end of the study, and between Devil’s claw and placebo recipients. The Devil’s claw extract used in this study was given at a dose of 800 mg three times daily, equivalent to a daily dose of 50 mg of harpagoside.
The interaction between Devil’s claw and antiplatelet drugs and NSAIDs is based on a prediction only.
Devil’s claw may increase the effects of warfarin, and possibly other coumarins. A case report from a 5-year toxicological study1 describes the development of purpura in a patient following the concurrent use of Devil’s claw and warfarin.
No interactions found.
Habitat
Found mainly in Namibia, Botswana, and parts of South Africa, devil’s claw is a protected plant due to overharvesting in the wild. It prefers clay or sandy soils and disturbed areas like roadsides. It is grown from seed in spring, with young tubers harvested in autumn and carefully separated from the roots to preserve medicinal potency.
Traditionally used for
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