Effects of national volume-based procurement policy on the usage and expenditure of platinum antineoplastic drugs in China: an interrupted time series study

The policy had an influence on promotion of generic substitution and the decrease in expenditures for platinum antineoplastic drugs while ensuring the usage of drugs. The third-generation platinum antineoplastic medications introduced into the fifth NCVBP policy had no major influence on the use of first- and second-generation platinum antineoplastic treatments. Although the general situation for alternative pharmaceuticals was largely steady, with no expected increase in costs and expenditures, monitoring of alternative drugs was required.