Rebecca,
Sorry to hear this. Some of these are probably hormone treatment, some are probably not.
Extreme lethargy, fatigue, low energy and mood - quite possibly hormone therapy, but may also be in part due to not eating properly due to...
Digestive problems including nausea and inability to swallow solid food, sleep disturbance - this doesn't sound like hormone therapy to me.
Increased urination particularly at night - sounds like prostate cancer side effect, which the hormone treatment should reduce. Is it new since hormone treatment started?
General aches and pains in the back and shoulders - this could be hormone therapy, or prostate cancer, or not related to either.
It would help if you could say what diagnostic tests he's had, what the results were, PSA levels and dates. The answers to the above could be different if he has metastasised prostate cancer, or if it's confined relatively locally to the organ.