Analysis of Patent and Regulatory Exclusivity for Novel Agents in China and the United States: A Cohort Study of Drugs Approved Between 2018 and 2021

Patent and regulatory exclusivity shall constitute incentives for pharmaceutical companies to develop new drugs. This study aims to investigate the differences in the patent term extension (PTE) and regulatory exclusivity between China and the United States, and to evaluate their potential impact on the market exclusivity period of novel drugs. Small-molecule novel drugs with their first indication approved in China and the United States between 2018 and 2021 were evaluated regarding their PTE and regulatory exclusivity. The PTE length of the China-approved drugs was calculated by simulation, whereas that of the US-approved drugs was extracted from the United States Patent and Trademark Office. Thirty-two and 107 novel drugs approved in China and the United States, respectively, were included in the study. The PTE length of the US-approved drugs calculated by the China-PTE method was significantly longer than that calculated by the US-PTE method. Patent extensions should be granted for 91% of new drugs in China and 82% in the United States. The simulated median PTE length of novel drugs approved in China was significantly higher than that of the United States (5.0 vs. 2.9 years, P < 0.05). It can be expected that the implementation of the PTE policy in China would significantly extend the period of market exclusivity for novel drugs similar to that of the United States. China should fully evaluate the potential impact of the PTE policy on the market exclusivity of novel drugs and provide better incentives to the development of novel drugs in addressing unmet clinical needs when developing its regulatory exclusivity policy.