Anaesthesia Intravenous Anesthetic Agents d2175718 All of the following acts on GABA receptor except A Propofol B Thiopentone C Etomidate D Dexmedetomidine High-Yield Explanation Dexmedetomidine acts on alpha 2 -adrenoceptor. propofol , thiopentone and etomidate acts on GABA receptor ketamine acts on NMDA receptor