Add green tea to the list of substances that interact with chemotherapy. Velcade also known as bortezomib is an important treatment for multiple myeloma. It seems to interact with green tea "products " according to a new report in the journal Blood. The report indicates that levels of polyphenols in green tea extracts could be high enough to interact with boron-containing medicine such as Velcade and researchers urge clinicians to warn patients against using these supplements if they are on this chemo treatment. This is ok: http://www.reuters.com/article/healthNews/idUSTRE51A5Z320090211?feedType... This is better: http://hematology.org/media/02032009.cfm