FDA Transparency Reveals Strategic Lessons from Rejection Letters for Kisunla, Vyondys 53, and Sunlenca
SHERIDAN, WYOMING – July 12, 2025 – A landmark release of 200 complete response letters (CRLs) by the U.S. Food and Drug Administration (FDA) has unveiled a decade of regulatory decisions behind once-rejected therapies, now approved and on the market. Among the most revealing cases are Eli Lilly’s Alzheimer’s treatment Kisunla, Sarepta’s Duchenne muscular dystrophy drug Vyondys 53, and Gilead’s long-acting HIV therapy Sunlenca.