10 mg of 5-MeO-DMT administrated intranasally or sublingually causes a significant visionary response.

Membranes were prepared from the cerebral cortex and striatum of Male SD rats and maintained in HEPES buffer pH 7.6, 20 mM HEPES, 7 mM MgCl2, 100 mM NaCl, 1 mM EDTA, 0.2 mM dithiothreitol (DTT). Cells were plated in 96 wells containing an assay buffer of 25 mM HEPES, pH 7.6, 7 mM MgCl2, 100 mM NaCl, 1 mM EDTA, 0.2 mM DTT and 10 mM DPCPX. Each well also received various concentrations screening compounds, DA, 5-HT, NE, and the mixture of brain membranes (2 mg protein/well for the striatum and 4 mg protein/well for the cortex) and 150 micro-M GDP. This mixture was pre-incubated at 30 °C for 20 minutes with shaking. Incubation was started by adding 0.1 nM [35S]GTPgS to a total volume of 100 mL and continued at 30 °C for 90 minutes with shaking. The reaction was stopped by rapid filtration and retained membrane-bound radioactivity on the filter was measured by liquid scintillation counting. 5-MeODMT was found to have an EC50 of 3.8 x 10^07 M.