Morphine hydrochloride extended-release tablets are mainly for analgesic effect, how powerful the analgesic effect is, first of all, the requirements of the three-step program for cancer pain treatment proposed by the State Drug Administration, it is a representative drug for the treatment of severe cancer pain. For example, if a cancer patient or a patient with advanced cancer is not well treated with tramadol or Daphne, he or she should go to the three-step morphine extended-release tablets to give analgesic treatment. It has a relatively strong analgesic effect and is mainly used for patients with advanced cancer to achieve a better analgesic effect. The dose is 30 mg, which is usually given to the patient, once at the beginning of 12h, to intervene earlier and give oral administration before the pain. The dose, which varies according to the patient’s pain, is usually given once every 6h. Because there is no ceiling effect, the dose can be increased slowly until pain relief is achieved, depending on the pain.