Treatment seems bad as the disease

Ah, bugger. What a crappy thing to be coping with. The Zolodex was a step too far for me so I had my ovaries removed which brought it's own set of 'stuff' but it seemed like a better option for my stage of life. I was 53 and had a recurrence.

Keep plodding and ask more questions about the other drug options. There are a couple and it is often difficult to determine why one has been prescribed rather than the others. It's worth having the discussion if you are not coping at the moment.