PrescriptionEventmonitoring (PEM) is a non-interventional observational method of adverse drug reaction monitoring, which was established first in England in 1981.
处方事件监测用非干预性、观察性药品不良反应监测方法，1981年在英国最早开展。
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Results and Conclusion Prescription- eventmonitoring is one of the most important methods of post-marketing drug surveillance and vital resource for providing ADR information.