One of the posters below mentioned using Essiac Tea. I would recommend Humaworm's version of Essiac, Humana Tea. The man behind Humaworm products goes by the initials RG. He has a forum here on Curezone, Ask Humaworm, and usually replies to any questions very quickly on his forum. I would suggest asking him if his tea would likely help your brother and what would be the dosing in his case.
As in any therapy chosen, you will want to make sure that any therapies used in combination are compatible with each other. I believe the website http://www.cancertutor.org
has information about which therapies are compatible together.
Also, there are posters in this forum that are very knowledgable and post in here frequently. dquixote1217 is one of those that are very knowledgable. If you read thru his postings you will find a wealth of information. I hope this helps.