Morphine Hospice Kidney Failure A Family Member Has Joined Hospice And A Nurse Delivered "Comfort Kit" Containing "Morphine Sulfate 25mg/ml S

A family member has joined hospice and a nurse delivered "Comfort Kit" containing "Morphine Sulfate 25mg/ml s - morphine hospice kidney failure

His instructions were to use as needed. My questions are, how does it differ from MSContin my wife is and what is the best way to inject a dose of EA. IV, IM, SC or by mouth.