Formation of the receptor complex establishes an optimal Gi-Gq balance in response to Glu and 5-HT (increase in Gi, decrease in Gq). A. Psychedelics (LY34 and DOI) invert the balance (strong Gi decrease, strong Gq increase). B. Disruption of the optimal balance in psychotic states (decrease in Gi, increase in Gq) can be compensated for by antipsychotics (LY37, clozapine, and risperidone) that recover the Gi-Gq balance (increasing Gi and decreasing Gq).