
21 CFR 211.192: production record review, what FDA cites, and what an investigation file needs
What 21 CFR 211.192 requires (quality unit review of production records before release, and a thorough, written investigation of any unexplained discrepancy that extends to other batches), what counts as an unexplained discrepancy, how FDA words 211.192 observations on Form 483s, which firms drew the citation in 2025 and 2026, how it relates to OAI outcomes, and what a defensible investigation file contains, from 302 observations on 296 drug inspections that closed January 2025 to October 2026.

















