This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
Which of the following is a metabolite of carisoprodol 
Select and explain. 
A. Meprobamate, B. Doxylamine, C. Dimethadione, D. Amphetamine
A: Meprobamate
Answer: A: Meprobamate 
Explanation: Refer Goodman Gilman 11/e p422 Meprobamate was used as a CNS depressant drug but is rarely indicated now due to its addictive propeies. It is a metabolite of carisoprodol, which is used as a centrally acting skeletal muscle relaxant