PEAQX tetrasodium hydrate (NVP-AAM077 tetrasodium hydrate) is a tetrasodium hydrate of PEAQX. PEAQX tetrasodium hydrate is an orally active and selective NMDA antagonist, with IC50 values of 270 nM and 29.6 μM for hNMDAR 1A/2A and hNMDAR 1A/2B, respectively. PEAQX tetrasodium hydrate can promote the activation of caspase-3 and induce cell apoptosis in cortical striatal slice cultures[1][2].