Can pau d'arco, oleander and graviola be taken together?

I have liver cancer and have started drinking pau d'arco tea. I am now wondering whether to also add graviola and/or oleander, or is it best to wait a few weeks on the pau d'arco to see how I go before starting on the graviola and/or oleander? I'm concerned that my time is running out. Your advice is very much appreciated ......thank you. Tweet