Final answer:
Glycopyrrolate is not an anesthetic agent; it is an anticholinergic drug. Midazolam, Etomidate, and Propofol are all anesthetic agents used for sedation and induction of anesthesia.
Step-by-step explanation:
All the following drugs are anesthetic agents except for Glycopyrrolate. Glycopyrrolate is not an anesthetic agent but rather an anticholinergic medication that is often used to reduce salivation and secretions in the airway prior to surgery or to reduce drooling in certain medical conditions. The other drugs listed, Midazolam, Etomidate, and Propofol are indeed used as anesthetics. Midazolam is a benzodiazepine that can induce sedation and amnesia but is often used in combination with other general anesthetics. Etomidate is an intravenous anesthetic used for the induction of general anesthesia. Propofol is a widely used intravenous anesthetic for the induction and maintenance of general anesthesia.