My doctor also switched me from Anastrozole to Exemestane. It's been 4 months and I haven't experience any serious side effects. Just the normal side effects such as pain in my legs when get up in the morning or sitting for a long time, eye blurry. Anastrozole caused my fingers to be so rigid that it's hard to grasp or hold on to something, pain in my right collar bone, etc. So far so good with Exemestane. Everybody reacts differently to AI. Give it a try. Most likely you'll be fine. Hugs.