This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following agents do not act via GABAA-cl – channel complex receptors 
Select and explain. 
A. Zopiclone., B. Benzodiazepines., C. Thiopentone., D. Promethazine.
D: Promethazine.
Answer: D: Promethazine. 
Explanation: None