Pau D'Arco - What is it & How to use

Early research shows that pau d’arco might prevent cancer cells from growing. It might also slow tumor growth by preventing the tumor from growing the necessary blood vessels. However, the doses needed to cause anticancer effects seem to cause serious side effects in humans.


Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.

The effectiveness ratings for PAU D’ARCO are as follows:

Insufficient evidence to rate effectiveness for…

  • Anemia.
  • Arthritis-like pain.
  • Asthma.
  • Bladder and prostate infections.
  • Boils.
  • Bronchitis.
  • Cancer.
  • Common cold.
  • Diabetes.
  • Diarrhea.
  • Eczema.
  • Fibromyalgia.
  • Flu.
  • Infections with yeast, bacteria, viruses, or parasites.
  • Intestinal worms.
  • Liver problems.
    • Psoriasis.
    • Sexually transmitted diseases (gonorrhea, syphilis).
    • Stomach problems.
    • Other conditions.

    More evidence is needed to rate the effectiveness of pau d’arco for these uses.


    The appropriate dose of pau d’arco depends on several factors such as the user’s age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for pau d’arco. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

    Safety Concerns

    Pau d’arco is POSSIBLY UNSAFE when taken by mouth. In high doses, pau d’arco can cause severe nausea, vomiting, diarrhea, dizziness, and internal bleeding. The safety of pau d’arco in typical doses is not known.

    Special precautions & warnings:

    Pregnancy and breast-feeding: During pregnancy, pau d’arco is POSSIBLY UNSAFE when taken by mouth in typical amounts, and LIKELY UNSAFE in larger doses. Not enough is known about the safety of applying it to the skin. Stay on the safe side and avoid use if you are pregnant.

    There is not enough reliable information available about the safety of taking pau d’arco if you are breast-feeding. Stay on the safe side and avoid use.

    Surgery: Pau d’arco might slow blood clotting and could increase the chance of bleeding during and after surgery. Stop using it at least 2 weeks before a scheduled surgery.

    Interaction with medication

    Be cautious with this combination.
    Medications that slow blood clotting (Anticoagulant / Antiplatelet drugs)
    Pau d’arco might slow blood clotting. Taking pau d’arco along with medications that also slow clotting might increase the chances of bruising and bleeding.

    Some medications that slow blood clotting include aspirin, clopidogrel (Plavix), diclofenac (Voltaren, Cataflam, others), ibuprofen (Advil, Motrin, others), naproxen (Anaprox, Naprosyn, others), dalteparin (Fragmin), enoxaparin (Lovenox), heparin, warfarin (Coumadin), and others.

    * The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.