Harper Tx receives Refuse-to-File on lead BTK inhibitor; cites incomplete pivotal QC package
CMC and clinical data lock timing flagged. Resubmission window narrows to Q4.
The latest FDA tranche of Complete Response Letters reads less like a string of individual misses and more like an audit of how sponsors plan oversight. A close read of the pattern.
CMC and clinical data lock timing flagged. Resubmission window narrows to Q4.
Primary endpoint met at week 12; key secondary endpoints separated from placebo. BLA filing on track for H2 2026.
Eight letters released under FOIA; recurring citations on monitoring oversight and protocol deviation handling.
Three substantive shifts that change how sponsors should structure their RBQM plans. We diff the 2024 draft against the May 2026 final.
Reviewers cited the sponsor's pre-specified deviation handling and inspection-ready monitoring as factors in their vote.
Sponsor oversight of investigator-led data correction process flagged as primary observation.
The methodology in 1,800 words. Why the agencies tell you exactly what they'll ask, and how to design oversight that produces those answers without scrambling.