This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intravenous Anesthetic Agents, Subject name: Anaesthesia
Transient acute adrenal insufficiency is seen with which of the following drug. 
Select and explain. 
A. Etomidate, B. Propofol, C. Thiopentone, D. Ketamine
A: Etomidate
Answer: A: Etomidate 
Explanation: Etomidate causes adrenal gland suppression. It inhibits an enzyme 11 beta hydroxylase on essential enzyme for coisol synthesis. Etomidate has the highest incidence (40%) of post operative nausea and vomiting (PONV) among the intravenous anesthetics. Propofol has antiemetic propeies thereby reducing PONV. Other potential adverse effects of etomidate: Adrenocoical suppression Myoclonus Seizure precipitation Pain on injection