Abstract:Objective To analyze the characteristics of adverse reactions (ADR) caused by CDK4/6 inhibitors in clinical application, so as to provide reference for clinical safe drug use.Methods Web of Science, PubMed, VIP, CNKI and Wanfang databases were searched for ADRs induced by CDK4/6 inhibitor, and the collected literatures were further analyzed statistically.Results A total of 34 cases of ADRs caused by CDK4/6 inhibitors were reported. Patients were averagely about 63.5 years old. Most of the ADRs occurred within 4 months after getting CDK4/6 inhibitors (29 cases, 85.29%). ADRs caused by CDK4/6 inhibitors mainly included damage of skin and its adnexa (14 cases, 41.18%), respiratory system damage (6 cases, 17.65%), hepatobiliary system damage (4 cases, 11.76%). 31 cases were cured or improved after drug withdrawal and/or symptomatic support. Three patients died in the end.Conclusion When using CDK4/6 inhibitors in clinic, drug safety monitoring should be strengthened to alert the occurrence of ADRs. The mechanism of adverse reactions of CDK4/6 inhibitors needs to be further studied.