If you were on TRT that long you might have not needed the pills. My radiation oncologist wanted to jab me the day we met with Lupron and do 28 treatments of Proton. I had been on TRT since 2008 with Androgel and my endocrinologist had tested with me off the TRT for a month and my T level crashed to castrate. I told the oncologist this, but he did not believe me which pissed me off as I am very familiar with all my bloodwork as I have an Excel Spreadsheet from 2008 with every reading. The hospital claims in their literature they treat every patient as an individual. LOL. So he tests me and guess what? 12 mg/dl which is lower than the Lupron shot promises. I tested two more times during the time I was off TRT and those two were also 12 ng/dl. The urologist who is going to prescribe my T tested my pituitary hormones and it was sending signals but the boys after all that time were not answering the call to duty. I gave the oncologist 8 months of self-castration and went back on two months ago and I feel much better for being 74. I also did the 5 Proton treatments rather than his 28. That happened when I told him I was going to do 5 CyberKnife treatments and all of a sudden, he goes "we can do 5". Guess who a coauthor of a study with a 6month Lupron shot and 28 proton radiation treatments and your first guess does not count. I too have read that having a low testosterone level after radiation increases your chances of Biochemical Reoccurrence. I have also seen studies that for someone over 70 it makes no difference in results weather you have the Lipron shot or not.