I wasnt on same treatment but I had 3 years Zoladex and 32 sessions of RT to treat Gleason 8 (upped to 9 after TURP) PSA 21 slight spread to seminal vesicles. Included in my treat was 2 years on trial with abiraterone, enzalutimide, prednisolone (steroid). The steroid is included to combat some of side effects of abiraterone I believe.
I did suffer many of the expected side effects but accepted them really and they did go a while after treatment finished. It is tempting to get on couch and stay on it as treatment does really cause fatigue but it is really good to get out and about.
I started treatment in 2015 aged 59 and all good up to now.
People are affected differently some worse than others but generally fatigue, muscle loss, libido I think are most common.
Peter