Assessing Post‐Marketing Requirements for Orphan Drugs: A Cross‐Sectional Analysis of FDA and EMA Oversight

Author:

Yu Jae Hyeon1,Lee Sangwon23ORCID,Kim Yoon Jung1,Kim Won Young1,Lee Min Jung1,Kim Yun1ORCID

Affiliation:

1. Department of Clinical Pharmacy, College of Pharmacy Daegu Catholic University Gyeongsan Korea

2. Department of Pharmacology Hanyang University, College of Medicine Seoul Korea

3. Department of Clinical Pharmacology and Therapeutics Hanyang University Seoul Hospital Seoul Korea

Abstract

The U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA) oversee pharmaceutical regulations, including orphan drugs targeting rare diseases with limited patient populations. Post‐marketing studies are crucial for monitoring safety and efficacy, with post‐marketing requirements (PMRs) mandated by the regulatory agencies to ensure compliance. This study aims to compare PMR statuses, objectives, and pivotal trial characteristics of orphan drugs approved by the FDA (n = 154) and EMA (n = 79) from 2008 to 2018, shedding light on regulatory differences and their impact on drug development. Contrary to expectations, our analysis found no significant disparity in the proportion of orphan drugs with and without PMRs approved by both the FDA (48.1%) and EMA (55.7%). Safety concerns surrounding orphan drugs post‐approval, attributed partly to pivotal trial design, underscore the need for robust post‐marketing surveillance. While the FDA primarily focuses on post‐marketing safety (36.1%), the EMA places a higher emphasis on both efficacy and safety (47.1%), reflecting distinct approaches to PMR management between the two regulatory bodies. The observed trend of delayed PMRs at the EMA (47.1%) highlights the importance of effective cooperation between regulators and pharmaceutical companies to ensure the timely completion of PMRs and enhance drug safety.

Publisher

Wiley

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