pretreatment with the neuroleptics haloperidol ( 0.025 , 0.5 and 1 mg/kg ip ) , sulpiride ( 20 and 40 mg/kg ) and alpha 2-antagonist yohimbine ( 1 and 3 mg/kg ip ) antagonized the behavioural effect of b-ht 920 whereas the alpha 1-antagonist prazosin ( 1 mg/kg ip ) had no effect on the response .
C0040615
neuroleptics
C0018546
haloperidol