Making a decision regarding making a treatment strategy decision ,if I have a BCR, while on a long-term 2nd/3rd generation “lutamide” monotherapy.
History: After failure on AS, Dr Myers put me on Xtandi monotherapy feb 2016. After immediately dropping to a an undectectable PSA and staying there till 5/31/22. Dr Myers titrated the Xtandi down every 4-6 months, till settling at 3 pills per week of monotherapy . xtandi. After 5/31/22, [after trying ramping up xtandi to full strength, which apparently failed]. I was switched to Erleada monotherapy by my new Dr, as Dr Myers had retired a number of years earlier.
A Possible Alternative Therapy Choices
Trying to implement some form of adaptive/evolutionary therapy to try to avoid the typical slide to castrate resistance. After reviewing a few of the adaptive therapy clinical papers with my dr, he commented that the theoretical strategies of on/off switching of meds, including multiple drug regimens, didn’t take into account the reality of the meds actual on and especially off time of these meds. Lupron was one of the meds used and he commented that as a depot this doesn’t provide a quick off time as desired in a number of these article approached. He seemed favor firmagon, given its rapid “on time”—don’t remember what he said about off time.
So, one strategy suggested would be add firmagon to the current backbone of Erleada continuous therapy and after Pca control is reacquired, adopt an alternating on and off of the firmagon injections. The timing of the on and off to be determined –[could be combined with some PSA trigger level]. Dr thinks this is possibly an adaptive strategy, that is clinically viable.
I really don’t want to face the unpleasantness of that injection , which has to be administered properly is given into the belly I think. Also, if I travel for a few months, where am I going find a place that can give me this special shot? Relugolix provides an oral alternative but the dr says this drug “doesn’t play well with other orals, in my current case Erleada.
Any comments/suggestions would be appreciated.