RESUMO
Objective To study the characteristics and trends of drug price fluctuation in our country in order to provide reference for the governments in evaluating their policy for the macro-control and management of drug price. Methods The drug price fluctuation was empirically analyzed using the ARCH model according to the monthly drug price data from 2011 to 2017. Results The drug price presented a fluctuant increasing trend with an even fluctuation amplitude and frequency, especially after its reform in 2015. The fluctuation of drug price did not show any clustered feature and significant impact on information but a rather strong memory. Conclusion The fluctuation of drug price is relatively stable in our country. The drug price control policy plays a rather effectively role in stabilizing thefluctuation of drug price. It is thus suggested that the governments should bring their role into full play in controlling drug price, regulating drug marketing, and supervising drug price.