Figure 1.

Effect of S-citalopram, 0.50, 1.0 and 2.0 mg kg⁻¹, alone and in combination with R-citalopram in the mouse 5-HTP potentiation test. Pretreatment time was 30 min. Results are expressed as the percent of maximum score and shown as mean±s.e.m. For further details refer to Methods. ^*P<0.05, ^**P<0.01 and ^***P<0.001 compared to corresponding S-citalopram-treated group (one-way analysis of variance followed by post hoc comparisons of means by t-test). Data for R-citalopram administered alone are shown in Figure 2.