Morphine is an opioid painkiller with powerful analgesic effects. Morphine is mainly used for pain relief of acute sharp pain that is not treated by other painkillers, such as severe trauma, burns, and advanced cancer pain. In patients with heart attack and normal blood pressure it can sedate the patient and reduce the burden on the heart. The most common adverse reaction to the drug is addiction, which usually occurs after more than a week of application and requires caution. Other common adverse reactions include nausea, vomiting, respiratory depression, drowsiness, constipation, and dysuria. For respiratory depression, increased intracranial pressure, bronchial asthma, prostate hypertrophy, urinary difficulties, severe hepatic and renal insufficiency patients are prohibited, pregnant and lactating women are prohibited. The drug belongs to the national special management of narcotic drugs, you need to strictly comply with the national management of narcotic drugs, prescribed by a professional doctor.