My sister has lung cancer and is taking oral morphine. The cancer has stopped growing but the pain in her side in increasing -- the cancer has spread to the hip but it is also not spreading in the last two cat scans. Is it possible that the morphine is causing her pain to increase. She is taking a large dose.
Morphine is a strong narcotic painkiller and with time tolerance develops in body to its effect, so dose has to be increased or other painkillers or adjunct Chat Doctor.  Also, it needs to be investigated if there is some underlying pathological fracture causing pain which may benefit from fixation or radiation therapy. Please discuss with the treating doctors.