We are here now and asked if it would diminish. Back pain is related to the tumor and will decrease as it shrinks with the chemo. Stomach pain was related to pancreatitis from her stent but is getting better slowly.. Both back pain and stomach pain mitigate with the Tylenol and Oxy (at night). It helps with eating while feeling less pain..! They are encouring us to stay ahead of it with the meds at this low dose..