Hi @Sooz
If your oncologist has prescribed Exemestane ( I take it too) it will be because they think it will give you the best chance of survival. Basically, that is what it comes down to.
I'm finding it more bearable than either Letrazole or Anastazole, but I still know I'm taking it. I've already had a recurrence--ten years after my first diagnosis--and I'm pretty keen to avoid another. I may be just buying time, but it's the best option I have. I think that is what you have to keep in mind. If you find it absolutely unbearable, then stop. But please, don't let anyone else's shitty experience influence your decision.
If you want more technical information ask your oncologist for it. These drugs have not been in common use for all that long from a scientific perspective, so the longitudinal data really isn't there. We can only hope they work.
Mxx