@xahnegrey40, @capatov, @jeffmarc
Thanks!

My friend has been complaining about morning pains and hobbling about the house for an hour for some years now. I suppose adding ADT on top of that was bound to be trouble. Not to mention a few more years of age!

I'll encourage him to join this group himself, though he's not really done this kind of public Internet stuff before, afaik.

I thought he'd been telling me all year that his oncologist had him on ADT through January, but all of a sudden the story has slipped to June, and looking around on the topic I see various duration recommendations listed according to various decision criteria, and then there's always the out, "... unless side effects are too severe." I can see that's a hard question to answer, and thank everyone for their inputs.