Jayson,

Thank you again for your message. If the tea is better, than probably there is special way to prepare it so you can extract the main ingredients (which is not as they say very soluble in the water).

I have found that sometimes they use alcohol to help extraction (I am not really fond of that idea especially if you have brain metastasises.
One website says:

http://www.life-enthusiast.com/index/Ingredients/Plants/Pau_DArco

"...Fortunately for the dying cancer victim in the Santo Andre Municipal Hospital, his brother was one doctor who decided to not adhere to the orthodox procedures in this case. Instead, he took the bark, boiled it in white wine, mixed the still hot brew with orange juice and let his brother drink the concoction on an empty stomach. As if by a miracle, the patient's pain disappeared, and he was able to sleep soundly. After a month of uninterrupted treatment with the brew, he was discharged from the hospital. A thorough examination had found no trace of cancer remaining...."
I have also found a product called Pau D’arco elixir (please see the website:
https://secure19.nexternal.com/shared/StoreFront/default.asp?CS=raintree&BusT...
. It says the following:
Pau D’arco extract Direct from the Brazilian Amazon, Raintree Nutrition's Pau d'arco Concentrated Extract uses new and proprietary extraction methods to concentrate and preserve the active ingredients found in this amazing rainforest tree. The main active chemicals in Pau d'arco require heat and alcohol to extract them as they are not very water soluable. Raintree's extract is rich in active and beneficial phytochemicals which occur naturally in this plant because we employ the best methods required based upon this plant's individual phytochemistry with heat and alcohol. The extraction methods utilized provides the equivalent of approximately 500 mgs of Pau d'arco bark per milliliter of extract - resulting in a highly potent concentrated extract

Kind Regards,
Luisa