after trying cannabis oil for several months, instead of my PSA going down, it almost doubled within the last three months and that in spite of my still being on Lupron. urologist suggested i start on chemotherapy as it would extend my life expectancy by 18 months. i asked him what my life expectancy would be if i did not. here's where it gets interesting. he said he didn't know because he doesn't have a crystal ball. this being the case, then how do they know it can be extended by 18 months. what is the cut off point ? am i the only one that sees the absurdity in this ?