Dexmedetomidine Hydrochloride Injection is mainly used as an adjunct to general anesthesia or for sedation prior to tracheal intubation. This drug is a receptor agonist, with analgesic and sedative effects, can be used for intensive care and mechanical ventilation of short-term sedation and analgesia; can also be used for postoperative pain medication, anesthesia adjuvant. This drug needs to reduce the dosage when mixing with other anesthetics, this drug may have hypotension, bradycardia, sinus arrest, temporary high blood pressure and other adverse reactions, should be observed in time to stop the drug. Dexmedetomidine hydrochloride should only be used by professionals and under certain conditions of supervision, this drug should not be used continuously for more than 24 hours, the duration of use of the drug for more than 6 hours, and the sudden discontinuation of the drug may cause adverse symptoms and reactions. It is contraindicated in people who are allergic to the product and its components. The drug should be administered by a healthcare professional.