###Human: Am I undertaking the right treatment for breast cancer? ###Assistant: Hello. I do not have full information regarding the case from your query. The conclusion I can make from the information which you have given is that the patient has bone metastasis only. The treatment for such a case is a change in hormone therapy. Your medication has already been changed from Tamoxifen to Arimidex. I do not know since how many days or months you are taking Arimidex. Has it made any difference in intensity of your back pain? You also need to take Zoledronic Acid injection (Zometa). This also helps in bone metastasis. You also need adequate pain medications, maybe Morphine preparation to control your pain.