Strong opioids are medicines used to treat severe or long-term (chronic) pain. Although there are many types of strong opioids (sometimes called opiates), morphine is the most commonly used. It works on your nervous system and brain to reduce the amount of pain you feel.
This is a companion discussion topic for the original article at https://patient.info/medicine/morphine-for-pain-relief-mst-oramorph-zomorph