Dulcolax, its generic name is pethidine hydrochloride. Pethidine hydrochloride is mainly used for analgesia, adjuvant of cardiogenic asthma, preanesthetic administration and artificial hibernation. 1. Analgesia: It is mainly used for severe pain caused by trauma, postoperative, advanced cancer, etc. If it is used for visceral colic, it needs to be combined with atropine. 2. Cardiogenic asthma adjuvant: at present, it has replaced morphine for the adjuvant treatment of cardiogenic asthma, and the effect is particularly good, the mechanism of action is the same as that of morphine (dilate peripheral blood vessels, reduce peripheral resistance, reduce the load on the heart, and contribute to the elimination of pulmonary edema), but the addictiveness is relatively low compared with that of morphine, so it is more effective than that of atropine. The mechanism of action is the same as that of morphine (dilation of peripheral blood vessels, reduction of peripheral resistance, reduction of cardiac load, favoring the elimination of pulmonary edema. 3. Pre-anesthesia administration: Used before anesthesia, it can eliminate patients’ preoperative tension, fear and other adverse emotions, thus reducing the dosage of anesthesia, and can induce anesthesia more gently and shorten the time of anesthesia induction. 4. Artificial hibernation: and chlorpromazine, isopromazine, artificial hibernation combination, reduce the basal metabolic rate of patients who need artificial hibernation. Pethidine is addictive and can also cause adverse reactions such as vertigo, dry mouth, nausea, and vomiting. It should be noted that supraventricular tachycardia, craniocerebral injury, intracranial space-occupying lesions, chronic obstructive pulmonary disease, bronchial asthma, and severe pulmonary insufficiency are contraindicated. Co-administration with monoamine oxidase inhibitors is strictly prohibited. This drug is a prescription drug and must be used under the guidance of a professional doctor.