Effects of antipsychotic drugs on butyrate‐induced visceral hypersensitivity to CRD in rats. The indicated doses (mg·kg−1) of sulpiride (Sul), haloperidol (Hal), quetiapine (Que), risperidone (Ris) or vehicle (1% methylcellulose) were administered p.o. to butyrate (Buty)‐treated rats. Two hours later, the CRD study was performed (A, B). (B) shows the collective AUC data from (A). Values are mean ± SEM; *
P < 0.05 vs. vehicle. Each graph of Buty + Vehicle group in four panels represents the same data as in (A).