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Tabebula avellanedae

Latin Name: Tabebula avellanedae            

Common name: Pau D’Arco

Family: Bignoniaceae

Parts used: Inner bark

Constituents: Naphthaquinones (lapachol and beta-lapachone), anthraquinones and flavonoids( including quercetin), saponins.

Medicinal actions: Antimicrobial, antiviral, antibacterial, antineoplastic, anti-inflammatory, anti-parasitic, antineoplastic, immune stimulant.

Medicinal use: Fungal infections, such as ringworm, candida, internal inflammatory conditions, cancer.


  • Flavanoid quercetin inhibits mitochondrial electron transport.
  • Napthaquinones lapachol has an anticoagulant effect in humans that produces vitamin K antagonism similar to warfarin.


  • Dried herb: 5g taken 2-8 times per day
  • Standardized extract: 2-4% lapachol – 15-20g taken 3-4 times per day

Toxicity: Only occurs with isolated lapachol.

Contraindications: Avoid during pregnancy.

Interactions: May interact with anti-coagulant medications.


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