Comparison of novel oncology drugs that received dual approval from the US accelerated approval and EU conditional marketing authorisation pathways, 2006–2021: a cross-sectional study

We aimed to provide insight into differences in drug review decisions made by the US Food and Drug Administration's (FDA) accelerated approval (AA) pathway and the European Medicines Agency's (EMA) conditional marketing authorisation (CMA) pathway, and to add to the current knowledge base of drug approval processes.This cross-sectional study thoroughly examines novel oncology drugs with dual approval through FDA AA and EMA CMA between 2006 and 2021. Statistical analysis was performed from June to July 2022.The study examined the regulatory differences between regions for dually approved novel oncology drugs, including approval decisions, pivotal efficacy clinical trials, speed of review and postmarketing obligations.During this time period, there was a difference in the use of the FDA AA and the EMA CMA (FDA: EMA: 41.2%: 70.0%, p<0.05). Of the 25 drugs approved by both the FDA AA and the EMA CMA, 22 (88.0%) of the regulatory decisions were based on the same pivotal clinical trials. But there were more differences in the requirements for postmarketing obligations, with the EMA's postmarketing obligations focusing on the efficacy and safety of the drug (EMA: FDA: 63.0%: 27.0%, p＜0.05) and the FDA's postmarketing obligations focusing more on the efficacy (FDA: EMA: 73.0%: 23.9%, p＜0.05). In addition, both the USA and EU had some postmarketing obligations completed beyond the schedule (30.4% and 19.2% in the USA and EU, respectively), with the longest delays lasting 3.7 years (0.2-3.7 years) and 3.3 years (0.04-3.3 years) in the USA and EU, respectively.The FDA and EMA have different orientations and benefit-risk balance considerations in the use of AA or CMA. It is also the case that the shortcomings in the design and implementation of postmarketing studies have made it a challenge to obtain the evidence needed to confirm a drug's benefits.