S zanbourei
E Tamaddonfared - deparment of basic sciences , fauclty of veterinary medicine, urmia university, umia- iran
A mojtahedin

in the present study the effects of intracerebroventricular ICV infentions of histamine, chlorpheniramine H -receptor antagonist and ranitidine H - resptor antagonist were investigated on visceral nocicption of histamine, chlorpheniramine h rescptor antagonist and ranitidine (H -receptor antagonst) were investigated on viscerial nociception induced by an intrapertitoneal IP injection of actic acid in rats. the latency time to the beginning of the first abdominal wall contraction

barin , histamine, chlorpheniramine, ranitlidine, visceral nociceptlon, rats