Not Medical Advice: A pill with M MS 100 imprint has been identified as Morphine sulfate extended release 100 mg.
Morphine is an opioid pain medication, sometimes called a narcotic. It belongs to the group of drugs called "narcotic analgesics".
Morphine is used to treat moderate to severe pain. Short-acting formulations are taken as needed for pain. The extended-release form of this medicine is for around-the-clock treatment of pain. It is classified as a Schedule 2 controlled substance under the Controlled Substance Act (CSA).
To treat chronic pain effectively, you must address its physical, emotional and psychological aspects. Check out some tips for coping with pain from the American Psychological Association.