You will do fine. I had HDR brachytherapy and the catheter was removed before I went home from the treatment center.
I just did some looking at the guanabanana. That is the spanish for sorsop. I used to live in Malaysia and there it is referred to as a strain of the durian which is in the jackfruit family. We ate theswe fruits regularly when they were in season. As to curative for cancer, that is a very strong claim and one website offered a lot of claims including the one you sited. To me that doesn't mean anything because you have to look at the studies. Besides, chemotherapy is not a primary treatment for prostate cancer. So is the claim even relevant to PCa? The one study I did see stated that it may reduce the EGFR (a growth factor) in breast cancer. My wife has had two bouts with breast cancer and no one has brought this up. One company in the UK called Triamazon is under indictment for the way the company has marketd their solution.
Check it out, read the studies and talk to your doctors about it. I have not heard anyone on this board bring this up and many of us are looking for everything we can to fight our disease. So I look forward to your information and good luck with the procedure.