Abstract:Objective To mine and analyze the adverse drug events of atezolizumab through EudraVigilance (EV) database, so as to provide a reference for rational use of atezolizumab.Methods Taking the generic name of"atezolizumab"as the search term, different levels of MedDRA terms were selected, and all reports of adverse drug events (ADE) related to atezolizumab in the EV database were extracted and analyzed.Results As of Jul 30, 2022, 7 076 cases of ADEs related to atezolizumab were collected from EV database, and 12 766 cases of ADEs occurred, including 11 721 cases of serious adverse events (91.81%). The patients were mainly male (56.83%), aged 65~85 years (44.39%), and the reporting population was mainly medical personnel (94.16%). Totally 27 system organ classes (SOC) of ADEs were involved, mainly including general disorders and administration site conditions (13.17%), gastrointestinal diseases (9.33%), and respiratory, thoracic and mediastinal disorders (8.69%). The preferred term (PT) was used to query the reports of each SOC. The top five PTs in the number of reports were fever, interstitial lung disease(ILD), diarrhea, pneumonia and febrile neutropenia(FN).Conclusion Atezolizumab is easy to cause serious adverse reactions, suggesting that its indications should be strictly controlled and the necessary pharmaceutical care should be carried out to ensure the safety of patients.