I started Exemestane back in Nov. '22. The first few weeks I really felt awful. Fatigue, nausea, 'vacant' feeling. Decreased dosing to every other day for a bit, then went to full dose alternating with 1/2 dose for a bit. I am now on full dose daily and feeling much better. No muscle or joint pains. I have not had a glucose check, but was normal back in July '22. I was not aware of glucose issues with this med. I am still deciding if I remain on the med or not. My DCIS was very small and risk of recurrence is very small....have to weigh that against side effects of having no estrogen. I would hang in there if you can and hope that side effects abate over time. Take care....