Abstract: In sodium pentobarbital anesthetized Sprague-Dawley strain rats, mean bloodpressure (MBD) and cerebrovascular resistance (CVR) fell by 14-21% and 8-22% (P<0. 05, n =5 ) respectively after Panax notoginseng saponins (PNS) 50-200 mg.kg-1 iv, While verapamil