Sorry for the delay in answering I haven't checked in on this site for a while...
I drank about 6 or 7 cups of pau d'arco per day, the recommended minimum for someone using it to fight Cancer is 4 cups per day,( I now take the maintenance dose of 2 cups per day), I know of someone who drank a gallon a day who is also Cancer Free today.. 10 years after being told he had 3 months to live!
I also took Essiac (and still do), and Milk Thistle which I believe is a must for anyone with a Liver problem. I took extra Vit C, E and lecithin supplements, as well as Bromelane and a very good multi with minerals, and maitake mushroom . I breifly tried the MGM tablets which are probally good but can become very expensive, I also tried some active enzymes but they made me feel sick and I stopped. I also fresh juiced twice a day (and still do)fruit in the am with lots of pineapple for the bromelane ( please excuse the spelling). The evening juice quite frankly "would make a Billy Goat Puke" as the saying goes, it has cabbage, celery, carrot, apple, ginger and garlic. It tastes awful but I am positive it has many healing qualities ...especially in the garlic which proved to actually kill cancer cells on contact in a petri dish.
There is lots of info re Pau d'arco at www.herb-care.com or www.pau-d-arco.com.
Take care and Best wishes for the Holidays,
Rob ( still 100% Cancer Free :-)