Morphine tablets are opioid receptor antagonists and are a potent analgesic, especially suitable for the pain relief treatment of middle and late stage malignant tumors. Morphine can also be used in patients with heart failure, which can significantly reduce the severe symptoms of pulmonary edema in heart failure patients. Morphine tablets can also be used in the treatment of diarrhea, mainly by using the side effects of morphine to inhibit intestinal motility. For patients with chronic diarrhea for a long time, morphine tablets can also be taken orally. Morphine has certain side effects and is easily addictive in the long term, usually 3-5 days to develop a certain degree of drug resistance, and more than a week to become addicted. It can also lead to liver and kidney damage, increased transaminases and bilirubin, and even respiratory depression. In patients with cranial injury cranial hypertension can lead to exacerbation of the disease.