2-Methyl-3,3-diphenyl-3-propanolamine (2-MDP) selectively antagonises N-methyl-aspartate (NMA).

Using electrophoretic application to rat central neurones in vivo, and bath application to frog spinal cord in vitro, 2-methyl-3,3-diphenyl-3-propanolamine was found to be a selective antagonist of N-methyl-DL-aspartate, but not of quisqualate or kainate. In this respect the (-) isomer proved to be about three times more potent than the (+) in both preparations.