This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pharmacology, Subject name: Pharmacology
All the following drugs act by blocking AMPA receptors of glutamate except 
Select and explain. 
A. Felbamate, B. Perampanel, C. Phenobarbitone, D. Topiramate
A: Felbamate
Answer: A: Felbamate 
Explanation: Felbamate acts on NMDA receptors of glutamate. Perampanil is a new class of drug acting on AMPA receptors,Phenobarbitone is also known to block these receptors. Ref: HL Sharma 3rd ed.Pg 527.