Pau D'Arco
Important Disclaimer
This is not medical advice. Consult a qualified healthcare provider before using any remedy, especially if pregnant, breastfeeding, on medication, or managing a health condition.
Overview
The inner bark of the Tabebuia impetiginosa tree from South American rainforests has been used by indigenous Amazonian and Andean peoples for centuries. Laboratory research confirms its naphthoquinone compounds (lapachol, beta-lapachone) have antifungal, antibacterial, antiviral, and anti-parasitic properties. Commonly used in herbal medicine for Candida overgrowth, UTIs, and immune support.
Traditional Use
Used by the Incas and other indigenous South American peoples for centuries. South American tribes including the Guaraní, Quechua, and Brazilian forest peoples used Pau D'Arco (literally 'bow tree' — the dense wood was used for bows) for infections, digestive complaints, fever, and skin conditions. Spanish missionaries documented its use in the 16th century. In the 20th century, reports of dramatic improvements in Brazilian cancer patients sparked intensive scientific research.
Key Active Compounds
Beta-Lapachone and Lapachol
Primary naphthoquinone compounds with documented antifungal (inhibits ergosterol synthesis in fungal cell membranes), antibacterial (inhibits DNA synthesis), antiviral, and antiparasitic activity. Also studied for anticancer activity (induces apoptosis in cancer cell lines through various mechanisms).
Evidence-Based Benefits
Candida and Antifungal
Some studiesLaboratory studies consistently confirm strong activity against Candida albicans and other fungal pathogens. Traditional and clinical use for systemic Candida, oral thrush, and vaginal candidiasis.
Antimicrobial and Antiviral
Some studiesDemonstrated activity against gram-positive bacteria, influenza, herpes, and HIV in laboratory studies. Traditional use for respiratory and GI infections.
Urinary Tract Infections
Traditional useTraditional Amazonian use for UTIs and kidney complaints. Antimicrobial activity relevant to urinary tract pathogens.
Common Preparation Methods
Pau D'Arco Tea (Decoction)
Gently simmer (do not boil) 1 tablespoon of dried inner bark in 1 liter water for 20 minutes. Strain.
Dosage: 2–3 cups daily for 1–4 weeksGentle simmering preserves the active naphthoquinones — high boiling may degrade some compounds. Mild pleasant taste. For Candida protocols, typically used for 4-week cycles with probiotic supplementation.
Safety & Cautions
Please read carefully before use
Contraindications
- Pregnancy — anticoagulant effects and traditional abortifacient use; avoid
- Pre-surgery — discontinue 2 weeks prior
- Children under 5 without medical supervision
Drug Interactions
- Anticoagulants — beta-lapachone affects platelet aggregation; monitor
- Immunosuppressants — immunostimulant activity
Possible Side Effects
- Generally well-tolerated at recommended doses
- High doses: nausea, GI cramping
- Very high doses: nausea, vomiting, anemia — stay within recommended amounts
Special Populations
- Avoid in pregnancy
- Adults: generally well-tolerated for short courses
- Consult herbalist for prolonged use
Sources & References
Evidence-Based Complementary and Alternative Medicine
Quick Reference
Bignoniaceae
Inner bark (only the inner bark of the living tree — not the outer bark)
Mild, slightly sweet, woody with pleasant vanilla-like undertones — one of the more palatable medicinal barks; easy to drink as a tea
Safety First
Always consult with a qualified healthcare provider before starting any new remedy, especially if you have existing health conditions or take medications.