original question: What is the drug mechanism of action of drugs with physiologic effect [General anaesthesia]?
answer: adrenergic alpha2-agonist
answer type: Drug mechanism of action.
auxiliary information: General anaesthesia is a medically induced coma and loss of protective reflexes resulting from the administration of one or more general anaesthetic agents. A variety of medications may be administered, with the overall aim of ensuring sleep, amnesia, analgesia, relaxation of skeletal muscles, and loss of control of reflexes of the autonomic nervous system. The optimal combination of these agents for any given patient and procedure is typically selected by an anaesthesiologist or another provider such as an anaesthesiologist assistant or nurse anaesthetist, in consultation with the patient and the medical or dental practitioner performing the operative procedure.
What is the mechanism of action in drugs with a physiologic effect when undergoing  [General anaesthesia]?