I would like some advice/opinion of next step for me.
My PSA has gone from 0,45 to 0,54 to 0,73 with an interval of 3 months each time and when you calculate the doubling time is going from 12 month to 6 month, so very soon my PSA will be sky high, if my double time also increase, What would be the next step in my treatment (today i get only 150mg Bicalutamide every day).
History: Advanced prostate cancer: Removed prostate and 25 lymph notes in 2018 (gleason 9), but PSA was still rising after the operation and got on bicalutamide, which now has stoped working.
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Jurasuje
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Drop the bicalutamide dose to 50 mg/day and monitor PSA closely. you might get pleasant surprise that your PSA is falling down due to what is called "bicalutamide withdrawal response. Enjoy that as long as it lasts and then, may be add lupron later on.
I am curious if you decided to stop the bicalutamide without adding any other treatment, what happened to your PSA level? I have tried to make sense of the bicalutamide "withdrawal syndrome" and concluded it is only applicable if the patient is also on a standard agonist or antagonist therapy (e.g. lupron plus bicalutamide or firmagon plus bicalutamide). My theory is as the bicalutamide becomes less effective (e.g., androgen receptor resistance or it acts as a fuel due to mutation), when it is stopped, the lupron becomes more effective (and/or it is not fighting the effects of the rogue bicalutamide) and PSA falls. This is only temporary because at some point it is likely lupron will start to fail too and/or the lupron has its own limits of effectiveness. So there can't be "withdrawal syndrome" on bicalutamide monotherapy. My guess is if you stopped bicalutamide monotherapy when PSADT is shortening , PSA will always rise, not fall. So, what happened in your case? Thanks.
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