The effects of the synthetic non-psychoactive cannabinoid (+)-(3S,4S)-7-hydroxy-delta 6-tetrahydrocannabinol 1,1-dimethylheptyl (HU-211) on the activity of the N-methyl-D-aspartate (NMDA) receptor/ion channel were examined. HU-211 non-competitively blocks the increase in binding of