Sufentanil Injection instructions dosage needs to be adjusted according to the individual response and clinical situation. Sufentanil injection refers to sufentanil citrate injection, as an analgesic component of complex anesthesia for the induction of the application, according to 0.1 ~ 5.0 μg / kg body weight for intravenous push or added to the pipeline, need to be finished within 2 ~ 10 minutes; if there is a decrease in the analgesic effect, it is necessary to add maintenance dose according to the 0.15 ~ 0.7 μg / kg body weight, the standard for sufentanil injection 0.2～1.0ml/70kg body weight. If sufentanil citrate is mainly used for general anesthesia, the total amount of the drug is 8-30μg/kg, and if there is a weakening of the analgesic effect, an additional maintenance dose of 0.35-1.4μg/kg body weight can be used, and the standard is sufentanil injection 0.5-2.0ml/70kg body weight. Sufentanil citrate injection is usually used for endotracheal intubation, general anesthesia using artificial respiration – as an analgesic for complex anesthesia – as an anesthetic induction and maintenance drug for major surgery under general anesthesia. In addition, some patients may experience adverse reactions, more typically opioid-like symptoms such as respiratory depression, apnea, myoclonus, hypotension, nausea, vomiting and vertigo as well as itching and pain at the injection site. This product is typically used in hospitals by healthcare professionals.