After a friend strongly recommended cannabis oil as a potential treatment, I did a fair bit of research into the matter. Tons of conflicting views and general lack of evidence (currently), and the only thing I could find of any substance - and that was tenuous! - is that THC rather than CBD may be effective in combatting PCa. Also, it would need to be in pessary form as it needs to be very near the cancer to be efficacious. So I was left with the option of putting undetermined amounts (at undetermined times) of a substance where I'd rather not, and that substance will have seriously detrimental effects of my cognitive ability. At that point, I stepped away and decided that I'll wait for the world to present some evidence based treatment rather than self-medicate. Hope that helps!