The U.S. Court of Appeals for the Fifth Circuit recently ruled in NicQuid, L.L.C. v. FDA, No. 24-60272 (5th Cir. Aug. 19, 2026), that the U.S. Food and Drug Administration’s (FDA) “comparative efficacy standard” is a substantive rule that was adopted in violation of the Administrative Procedure Act’s (APA) notice-and-comment rulemaking requirements.







