The in vitro inhibitory effects and in silico docking energies of 18 compounds with respect to Aquaporin 4 (AQP4) were investigated. More than half of the compounds tested showed inhibitory activity in the in vitro functional assay and included the 5-HT_1B/1D agonists sumatriptan, and rizatriptan. Moreover, the observed inhibitory activity of the compounds used in this study at 20μM showed a strong correlation with their in silico docking energies, r²=0.64, which was consistent with that found in previous studies. The AQP4 inhibitory IC₅₀ values of three compounds, 2-(nicotinamido)-1,3,4-thiadiazole, sumatriptan and rizatriptan, were subsequently found to be 3, 11, and 2μM, respectively.