... with what I know is a kidney stone, and am in agony. I found in the medicine kit a prescription that is 4 years old of Morphine Sulfate, that I have for the same reason. Is 4 year old Morphine Sulfate safe to take? Please help me, as I am in agonizing pain, but am afraid to take these pills. My husband is just telling me to take them, but I want to ensure I do not harm myself