OBJECTIVE: To investigate the occurrence of medication errors（ ME） in Beijing hospital（ hereinafter referred to as "our hospital"）

and explore strategies to ensure medication safety and prevent errors. METHODS: ME reported from Jan. 2016 to Sept. 2019 in our hospital were collected. Retrospective analysis was performed to record the categories

contents

triggers

discoverers

and error-related drugs of ME. RESULTS: Totally 828 cases of ME were collected

including 2 cases of category A

811 cases of category B

15 cases of category C

category D and above was not reported. In terms of the ME contents

the proportion of drug dosage error was the highest（ 187 case-times

accounting for 22. 45% of the total 833 case-times）

followed by drug variety error（ 170 case-times

accounting for20. 41% of the total 833 case-times） and the repeated medication error（ 101 case-times

accounting for 12. 12% of the total 833 case-times）. Among the triggers of ME

unskilled ME was the most common（ 255 case-times

accounting for27. 75% of the total 919 case-times）

followed by lack of knowledge（ 241 case-times

accounting for 26. 22% of the total 919 case-times）. Of the 828 cases of ME

the main cause cases of ME was clinicians（ 490 cases

59. 18%）;pharmacists found and reported the most ME（ 564 cases

68. 12%）. Among of the ME reports

cardiovascular system drugs were the most frequently error. CONCLUSIONS: Our hospital should strengthen the professional skills training of clinicians and pharmacists

as well as further optimize the hospital information management system in order to reduce the occurrence of ME and ensure the safe medication for patients.