Effects of volume-based procurement policy on the usage and expenditure of first-generation targeted drugs for non-small cell lung cancer with EGFR mutation in China: an interrupted time series study

The evidence provided in this study indicated that the implementation of NVBP policy was related to the expenditure reduction of the first generation of anti-EGFR lung cancer drugs. The policy effectively controlled the increase in expenditures for corresponding drugs while ensuring the use of drugs.