I think that's good advice. Enzalutamide may work longer than otherwise expected after the chemo, but it probably won't work for more than a few months. Keytruda has no proven benefit unless he has a rare genomic mutation. Lu-177-PSMA is a good choice imho, but it is expensive.
I believe the best sequence of these treatments is unclear. They could try enzalutamide or rechallenge with abiratoraterone . Sometimes these drugs could work again or better after treatment with chemo. If both fail, cabazitaxel could be an option. You could also try Lu 177 PSMA treatment. I had this treatment in 2016 for lymph node metastases in the pelvis and abdomen and it was effective.
I wonder if one or more of the metastases could be biopsied to determine if there are mutations which could have specific treatments. If direct biopsy is not possible, they could try a liquid biopsy to determine if the androgen receptor AR V7 is present which could indicate poor response to enzalutamide and/or abiraterone.
Went with chemo and after #5 added xtandi acct rising PSA. Did my 9 cycles and combined chemo/lupron/xtandi side effects were really bad. Pushed PSA to 0.130 and now stable. Xtandi should be good option for you, if 160 mg to strong (toxic side effects) cut dose to 120 mg or less. I'm now at 90 mg---three days 2 pills one day 3 pills. Holding every thing in check and recovering from long term side effects. .
It's all a crap shoot, people can tell you what worked for them but it may not work for you. I just finished 9 cycles of chemo in June PSA was going down for first 6 cycles then started going up again after last 3 cycles. So MO canceled Cycle 10 and put me on Enzalutamide. Enza made no difference at all PSA continues to double roughly 1 month intervals. Next stop - MO is doing DNA tests to see if I will benefit from PARP inhibitor.
Sorry dont mean to be pessimistic. But no one can really tell you what to do next. You have a number.ber of options, they may all work, some may work, none of them may work. You just to keep fighting and find something that works for you.
Do a search on (click on their icons) pinks124 and drsidhar53 from their posts yesterday 10/15/2018. Both of these gentlemen are in India and you might find their posts and the replies informative.
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