Just checked the clinical trials site for alternative medicine in bladder cancer. Turns out that a new trial - not yet recruiting - is investigating the possibility that St. John's Wort may interfere with chemotherapy; that is, taking this supplement while on chemotherapy may stop the chemotherapy from destroying the cancer.
About 10 years ago the medical community was shaken when they discovered that beta-carotene [a Vitamin A precursor] supplementation increased the rate of growth of some lung cancers. So pls be very careful when considering mixing chemo [or radiation] therapy with ANY other meds, natural or otherwise.
Here's the link to the clinical trial: http://clinicaltrials.gov/ct/gui/sho...E7E8EE?order=2
The countries that have the most research and clinical experience using alternative therapies either alone, or in conjunction with Western chemo/radiation, are: Germany, Japan and India. Suggest you look up their research. Try using Scirus and/or Copernik2001; these are med/sci search engines that are especially useful in locating obscure med/sci journal articles.