The effects of pethidine mainly include analgesia, sedation, elimination of edema and so on. 1. Analgesia: pethidine belongs to the opioid analgesic drugs, clinically, it is mainly used for all kinds of severe pain, such as trauma, burns, scalds, postoperative analgesia, anesthesia before the use of drugs and so on. Sometimes in myocardial infarction caused by severe angina, you can also use pethidine pain. 2. Sedation: pethidine also has a sedative effect, for some by severe pain or mental illness and lead to emotional mania patients, can not be quiet to accept the treatment or postoperative mania patients, or the need for artificial hibernation of patients, can use pethidine to achieve the effect of sedation. 3. Eliminate edema: For some patients with cardiogenic asthma, pethidine can also be used to help eliminate pulmonary edema. Supraventricular tachycardia, craniocerebral injury, intracranial space-occupying lesions, chronic obstructive pulmonary disease, bronchial asthma, and severe pulmonary insufficiency should not use this product. Co-administration with monoamine oxidase inhibitors is strictly prohibited. Pethidine is an addictive drug and may cause dizziness and headache, dry mouth and sweating, nausea and vomiting, etc. It should be prescribed by a qualified doctor and used in strict compliance with medical advice.