@Mwm1020. I understand you had your prostate removed - presumably because you had prostate cancer. I also assume you are now receiving hormone therapy (followed by radiation?) because your cancer has returned.
I am in a similar situation, so my salvage treatment included hormone therapy with Bicalutamide (Casodex) pills, then subcutaneous injections of Luprolide (Eligard). Your medications may be different, but they likely have similar roles as the ones that I was treated with.
The pills and the injections work in different ways, but have the same purpose: to starve the prostate cancer cells of testosterone. This stops or slows their growth. Radiation then follows if the location of the prostate cancer is known - which kills the targeted cells.
Based on my understanding of those who are on hormone therapy, there is a wide variety in side effects depending on the individual although they generally have similar features (such has hot flashes). This is in part because of the wide variety of medications that are used for different situations which has increased the tools oncologists can use to treat this disease.
For me, the Bicalutamide pills resulted in mild warm flushes that lasted less than 30 secs. For the injections the side effects I experience includes intense hot flashes (may be 10-15?/day but lasting only a minute), muscle/joint stiffness, loss of sex drive, bladder urgency and nocturia (frequent night time urination). I only have mild fatigue and belly bloat but others will experience different effects in different intensities. Since I was also treated with radiation, some of the side effects may be due to the radiation (such as bladder urgency).
The injections have a limited dosage period (1, 3, 6 months I think). My last dosage period ended in May, but the effects are still with me and I expect they will still be with me for a while yet. I try to keep physically active and socially involved. To me, this helps blunt the side effects which to me is a small price to pay to extend my life by (hopefully) many years.
If you are going through salvage treatment for prostate cancer, I would recommend joining the Mayo Clinic Prostate Cancer Support Group discussion forum. The side effects of hormone therapy is a common discussion tread.
https://connect.mayoclinic.org/group/prostate-cancer/
Hope this helps.