Hi LAPD. I'm Aliza and I'm a BC patient. I'm also a Medical Librarian who's retired but still keeps in practice on this site and elsewhere by offering advice (usually non medical) referrals to doctors, hospitals, institutions, agencies, etc. and research for both patients and medical professionas when necessary. First when I saw your name I thought the Los Angeles Police Dept. was posting a question...;)
I'm 54 years old, was stage I, and had a Mastectomy, but no chemo because Oncotype genetic testing ruled it out. My Oncologist prescribed Tamoxifen for me because she says I'm perimopausal, though it's been nearly a year since I've menstruated. I thought after a year, you're in menopause (at least according to my ob/gyn) but she has a different definition and it's 2 years. I'm not arguing with this woman. First I like and trust her a lot!! Second, I'm being treated at Memorial Sloan Kettering Cancer Center in NYC. She wouldn't be there unless she was great, so...
She told me that if I feel bone pain that I should take Claritin (the anti-histamine) once a day. Before you run out to buy it, check with your oncologist. I'm having bone pain and that's what it's for. I have fibromyalgia anyway because in addition to BC, I'm a card carrying Lupus patient. Being a Lupus patient, I'm already immunocompromsied (that's why I'm especially happy that I didn't require chemotherapy), but I am prone to infections - yeast infections, UTI's, etc. I can tell you from personal experience (which I am permitted to do) that my Primary Care Physician is a nephrologist (kidney specialist) and she saw me a few months ago for a UTI. I had bought a kit in the pharmacy to test it and it worked beautifully so I went knowing exactly which bacteria were positive and she retested me to be sure-same results. But soon afterwards, I was shopping at The Vitamin Shoppe. I found Cranberry pills. They're large gel caps and they're concentrated. If you take two per day it's like drinking lots and lots of cranberry juice and it's been shown by the FDA to reduce the number of UTIs that women get. So there's something to consider.
Re your fibromyalgia - you'd have to discuss this with your oncologist. There are drugs - certain anti-depressants that are used to assist in alleviating pain. I believe Cymbalta is one of them. I know there are others.
Re your Arimidex-there are other aromatase inhibitors to try if your Oncologist feels you cannot tolerate this if you can make some changes, i.e., by adding Claritin, for example, and/or Cymbalta perhaps. However, we all know that with adjuvant therapy, there is no free lunch. All medications (including aspirin) have side effects and come with some risks. (If aspirin came on the market today, it would be a prescription drug [at least here in the U.S.]).
I hope that I've given you some thoughts to discuss with your doctor. I would if you're Estrogen Receptor+, not go off an aromatase inhibitor myself. I'd be too scared, especially since I didn't have chemotherapy. However I'm not you. You must make the best decision for yourself, considering all of the factors involved and discuss this in depth with your Oncologist.
Best of luck in solving a difficult dilemma,