Fagara Root (Zanthoxylum zanthoxyloides): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Fagara root work for sickle cell disease?

Fagara root contains benzophenanthridine alkaloids, particularly fagaronine, which demonstrate antisickling properties by inhibiting the polymerization of hemoglobin S. These compounds help prevent red blood cells from adopting the characteristic sickle shape under low oxygen conditions. Laboratory studies suggest the alkaloids may also reduce oxidative stress and membrane damage in red blood cells. Evidence Level: C (preclinical evidence supports the mechanism, but human trials are limited).

Does Fagara root interact with medications?

Limited research exists on Fagara root drug interactions. The benzophenanthridine alkaloids may theoretically affect cytochrome P450 enzymes, potentially altering the metabolism of certain drugs. Patients taking anticoagulants, antiplatelet medications, or drugs metabolized by the liver should exercise caution. Always consult a healthcare provider before combining Fagara root with prescription medications, especially for sickle cell disease management. Evidence Level: C.

What is the recommended dosage for Fagara root?

Traditional use and available evidence suggest an adult dosage of 3-9 grams of dried root daily, typically prepared as a decoction or infusion. This dosage range is based on traditional West African practice rather than standardized clinical trials. Dosage should be individualized based on the condition being treated. Consult a qualified healthcare provider for personalized dosing recommendations. Evidence Level: C/Traditional.

Is Fagara root safe during pregnancy?

Fagara root is contraindicated during pregnancy and should be avoided. The benzophenanthridine alkaloids, including fagaronine, may pose risks to fetal development. Traditional use and available evidence classify this herb as unsafe for pregnant women. Women who are pregnant, planning to become pregnant, or breastfeeding should not use Fagara root preparations. Evidence Level: C.

What is Fagara root used for in traditional medicine?

Fagara root, derived from the African prickly ash tree (Zanthoxylum zanthoxyloides), has been used traditionally in West African medicine for managing sickle cell disease, fever, infections, and various pain conditions. The root is valued for its antisickling, analgesic, and antimicrobial properties. While laboratory studies support some traditional uses, clinical evidence remains limited. Evidence Level: C/Traditional.

What are the side effects of Fagara root?

Fagara root is generally well tolerated when used at recommended doses. Limited reporting exists on adverse effects, though some individuals may experience gastrointestinal discomfort or allergic reactions. Long-term safety data is lacking. Due to the presence of potent alkaloids, excessive doses should be avoided. Discontinue use if any adverse reactions occur and seek medical attention. Evidence Level: C.

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Fagara Root (Zanthoxylum zanthoxyloides) is a West African medicinal plant used traditionally for malaria, diabetes, and sickle cell anemia [PMID: 35381308, 31365939, 31546868].

Background

Zanthoxylum zanthoxyloides (syn. Fagara zanthoxyloides) is a tree native to West Africa [PMID: 31365939, 31546868]. Its root bark is commonly used as a toothbrush by West African populations [PMID: 16783692, 15616304].

Traditional uses

Traditional uses include the treatment of malaria, diabetes [PMID: 35381308], sickle cell anemia [PMID: 31546868, 23567034], wound dressing, and as a pain reliever [PMID: 23567034]. It is also used for diarrhea, cough, and fever [PMID: 25750297].

Active compounds

Identified compounds include benzophenanthridine alkaloids such as zanthoxyloithrine, chelerythrine, and $\gamma$-fagarine [PMID: 39326796, 31365939]; isomeric divanilloylquinic acids (burkinabins A, B, and C) [PMID: 19110407, 15110696]; and other metabolites such as buesgenine, skimmianine, pellitorine [PMID: 31365939], and fagaramide [PMID: 40509356].

Mechanism of action

The root extract inhibits neuroinflammation in BV-2 microglia by reducing levels of TNF$\alpha$, IL-6, IL-1$\beta$, NO, and PGE2, while increasing IL-10 and preventing NF-$\kappa$B transcription factor and NLRP3 inflammasome activation [PMID: 33791805].

Clinical evidence

Evidence DDiabetes

Ethyl acetate fraction of root-bark showed antidiabetic properties against alloxan-induced diabetes in Wistar rats [PMID: 35381308].

Evidence DMalaria (P. falciparum)

Root bark extracts inhibited the growth of both chloroquine-sensitive and chloroquine-resistant strains in vitro [PMID: 31365939, 15616304].

Evidence DSickle Cell Disease

Isomeric divanilloylquinic acids from root bark showed antisickling properties [PMID: 19110407], although one study using aqueous root extract failed to confirm an antisickling effect in vitro [PMID: 1202311].

Evidence DHepatocellular Carcinoma-like phenotype

Combined stem and root alkaloidal extract exerted hepatoprotective effects in CCl4-induced rat models [PMID: 39105209].

Evidence DAfrican Trypanosomiasis

Root fractions and isolated compounds (furoquinoline and oxylipin) showed significant growth inhibition of T. brucei in vitro [PMID: 33322191, 31354849].

Evidence D

Safety & adverse effects

The LD50 of the methanolic root-bark extract in mice was 5.0 g/kg, with signs of cerebral irritation and histopathological evidence of liver and renal tubule necrosis [PMID: 14676717]. A hydro-ethanolic root extract showed an LD50 of 1682.3 mg/kg in rats [PMID: 28487906]. High concentrations of Z. zanthoxyloides extracts showed cytotoxicity and genotoxicity to human leukocytes [PMID: 26401368].

Evidence summary

The current evidence is based primarily on in vitro studies and animal models (Level D), demonstrating significant pharmacological potential for antidiabetic, antimalarial, and anticancer activities, though toxicity at high doses has been noted.

PubMed sources

1.PMID: 35381308 (2022) — Ethyl acetate fraction of Fagara zanthoxyloides root-bark possess antidiabetic property against alloxan-induced diabetes and its complications in Wistar rat model. · Journal of ethnopharmacology
2.PMID: 39326796 (2024) — Antileishmanial, antitrypanosomal and anti-coronavirus activities of benzophenanthridine alkaloids and other specialized metabolites isolated from the root bark of Zanthoxylum zanthoxyloides (Lam.) B.Zepernick & Timler. · Fitoterapia
3.PMID: 33791805 (2021) — Zanthoxylum zanthoxyloides inhibits lipopolysaccharide- and synthetic hemozoin-induced neuroinflammation in BV-2 microglia: roles of NF-κB transcription factor and NLRP3 inflammasome activation. · The Journal of pharmacy and pharmacology
4.PMID: 31365939 (2019) — Anti-plasmodial Effects of Zanthoxylum zanthoxyloides. · Planta medica
5.PMID: 34367300

Fagara Root

Sources & Citations

Calculate a safe dose of Fagara Root

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Frequently asked questions

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Evidence summary

PubMed sources

Government sources

Fagara Root

Sources & Citations

Calculate a safe dose of Fagara Root

Related Herbs

Ardisia Crenata

Hypericum hookerianum

Renealmia alpinia

Frequently asked questions

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Evidence summary

PubMed sources

Government sources