Here are some links that you may also find interesting:
Concerned about Herb-Drug Interactions? ITM has put together a good article about it here.
For decades I've lectured my patients, and anyone else who will listen to me, about the importance of drinking an adequate amount of plain unadulterated water. This interview underscores many of the points I try to get across to people on how they can simply and easily help themselves by the simple act of drinking good quality water: Interview with Dr. Batmanghelidj .
On that subject, here is another good site to read research on drug-herb interactions. Basically, all major and many of the minor medical journals, have their articles listed in a large database maintained and operated by the National Center for Biotechnology Information (NCBI) of the National Library of Medicine (NLM), which is a division of the National Institutes of Health (NIH). Most of this information can be accessed here in addition to other topics.