Do not give pau d’arco to infants or children.
It is important to discuss the dose with your health care provider, since large amounts of pau d’arco can be toxic. The risk of side effects seems to be greater when the dose of lapachol is more than 1.5 g per day. However, it can be hard to determine how much lapachol the powdered bark contains.
The use of herbs is a time honored approach to strengthening the body and treating disease. Herbs, however, can trigger side effects and can interact with other herbs, supplements, or medications. For these reasons, you should take herbs with care, under the supervision of a health care provider.
Talk to your health care provider to determine the proper dose of pau d’arco because too much can be dangerous.
At recommended doses, side effects are uncommon but may include anemia, nausea, diarrhea, and dizziness.
High doses can cause uncontrolled bleeding and vomiting.
Pregnant and nursing women should not take pau d’arco.
Antiplatelet and anticoagulant drugs (blood thinners) — Pau d’arco may affect the blood’s ability to clot, and could interfere with any blood thinning drugs you are taking, including:
- Warfarin (Coumadin)
- Clopidogrel (Plavix)