Narcotic drugs refers to anesthetic drugs, is a role in the body, so that the body appears transient, reversible pain and loss of consciousness of the drug, commonly used anesthetic drugs, including procaine, lidocaine, propofol and sevoflurane, etc., the use of the drug and the effect of the drug are different. 1. Procaine: mainly used for surface infiltration anesthesia and nerve block anesthesia, is a local anesthetic drugs. 2. Lidocaine: commonly used in lumbar spinal nerve block anesthesia, part of the population have soft tissue pain can also be sprayed locally, belongs to the commonly used local anesthetic drugs. 3. Propofol: the main clinical choice for general anesthesia through intravenous injection, belonging to one of the most commonly used general anesthetic drugs. 4. sevoflurane: for inhalation anesthetic drugs, for general anesthesia treatment. Commonly used anesthesia drugs such as ropivacaine, isoflurane, etomidate, etc., the use of different drugs will be different, need to be standardized under the guidance of clinicians. After the use of drugs, once the heart rhythm is abnormal, obvious dizziness symptoms or systemic allergic reactions, need to be treated immediately.