Lymph nodes negative, bone scan fine, bloodwork fine. Since Sept. 15 '10 I take Arimidex. No side effects until Nov. 8. From that date on I get diarrhea 3-4 times a week. I am considering not to take the Arimidex any longer. Oncologist of course recommends to continue with Arimidex. What are my chances if I discontinue. I am a very healthy (otherwise) 83 year old, 120 lbs.