Dizocine injection is a class of pain medication often used in clinical practice and belongs to a class of strong pain relievers. It is mainly used for pain relief treatment after surgery or for severe pain caused by other reasons, such as cancer pain caused by malignant tumors. The main adverse effects of dizocin injection include nausea, vomiting, constipation, diarrhea and other symptoms of the digestive tract. Patients may also experience dizziness, the incidence of which is about 1%-3%. Other rare adverse reactions include poor sleep, headache, and respiratory depression, blurred vision, urinary frequency, urinary retention, and skin allergy, but the incidence of these adverse reactions is relatively low, with an incidence of less than 1%.