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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Which of the following agents do not act GABAA Cl- channel complex receptors?
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The correct answer is  Zopiclone (non benzodiazepine hypnotics ),benzodiazepine ,thiopentone(barbiturates) all act on GABA-Cl channel ,whereas promethazin is a antihistamine drug that acts on histaminergic receptors which causes high sedation. Ref: KD Tripathio 8th ed.