I don't know if it is relevant but my husband was on arberatitone for about 19 months and did really well on it for all that time, giving us the opportunity to have two fabulous holidays on consecutive years. Sadly his psa started to rise and they decided to put him on chemotherapy. Although he tolerated the chemotherapy well, the course stopped after 6 of 10 sessions due to Covid. The after affects were not good and his kidneys were affected so sadly he did not survive for more than 4 months after the chemo.
I do not know if he would have been able to have the arberatitone for any longer as they took him off it when psa reached 78.
I think the two drugs work in a similar way.
I wish you many happy years ahead.