<prompt> Which does not act by blocking NMDA receptors-MethoxetamineMethadoneKetamineDiltiazem  <response>: Ans. is d i.e., Diltiazem o Drugs acting bv blocking NMD A receptors are:i Methoxetamineii Methadoneiii Felbamateiv Acamprostv Ketaminevi Phencyclidinevii Dizocilpineviii Dextropropoxypheneix Tramadolx Pethidinexi Atomoxetinexii Nitrous oxide 