The exigencies of ultra-orphan drug development have provided the early testing ground for the US FDA’s limited use of real-world evidence (RWE) in approval decisions, resulting in 13 approvals identified by the Pink Sheet that relied on external or historical controls to place single-arm efficacy trials in context or derived data from case reports and expanded access protocols.
FDA’s most recent approval using RWE – the July 27, 2018 clearance of Fresenius Kabi AG’s I.V. lipid emulsion...






