Research Article
Effects of Chlorpheniramine and Ranitidine on the Visceral Nociception Induced by Acetic Acid in Rats: Role of Opioid System
Section of Physiology, Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, P.O. Box 1177, Urmia 57153, Iran
E. Tamaddonfard
Section of Physiology, Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, P.O. Box 1177, Urmia 57153, Iran
A. Mojtahedein
Section of Physiology, Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, P.O. Box 1177, Urmia 57153, Iran