I have experienced severe bone pain from two different treatments. It can be quite intense, as you expressed. After being told that some patients got relief from taking over the counter Claritin, I asked my oncologist about it and was given his okay. In both cases I took it few days before through few days after and had very significant pain relief. Later a drug rep from one of the drug companies said his company had begun suggesting it. We are all different but it may be worth conversation with your ordering physician.
If you try it will you please let us know about your response? Best wishes, Nancy