fa2008-3866 Seizure Characteristics in Patients with Seizure Attacks In the present study, the differences in the relaxant effects of aqueous, ethyl acetate and n-butanol fractions of Rosadamascena on tracheal smooth muscle of guinea pigs were examined. Bronchodilatory agents,Fractions, Guinea pig,Rosa damascene, Trachea Hassan Rakhshandah Pharmacological Research Center of Medicinal Plants, Medical School, Mashhad University of Medical Sciences, Mashhad, Iran No Mohammad Hossain Boskabady Department of Physiology, Medical School and Pharmaceutical Research Centre, Mashhad University of Medical Sciences, Mashhad, Iran email: boskabadymh@mums.ac.ir No Zahra Mossavi Department of Physiology, Medical School and Pharmaceutical Research Centre, Mashhad University of Medical Sciences, Mashhad, Iran No Malihah Gholami Department of Physiology, Medical School and Pharmaceutical Research Centre, Mashhad University of Medical Sciences, Mashhad, Iran No Zahra Saberi Department of Physiology, Medical School and Pharmaceutical Research Centre, Mashhad University of Medical Sciences, Mashhad, Iran No