In addition to benzodiazepines, other allosteric modulators of GABAA receptors such as general anesthetics of diverse chemical structure, including volatile agents and intravenous anesthetics, such as barbiturates, long-chain alcohols, neuroactive steroids, etomidate, propofol, as well as ethanol (Olsen & Sieghart, 2008) can be used for the identification of specific GABAA receptor subtypes.
