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ImmuCell halts Re-Tain mastitis drug development due to FDA manufacturing concerns, shifting focus to its First Defense calf product.
ImmuCell has halted further development of its Re-Tain mastitis drug after the FDA issued an incomplete approval letter citing unresolved manufacturing issues at its contract facility.
The company will redirect resources to its First Defense calf-health product, expanding its sales force by 50% and boosting production to address a $4.4 million backlog.
A $2.3 million non-cash charge is expected in Q4 2025.
While Re-Tain’s development is paused, ImmuCell plans to explore licensing or partnerships for the drug.
The decision reflects challenges small biotechs face with FDA compliance when relying on third-party manufacturers.
ImmuCell detiene el desarrollo del medicamento Re-Tain para la mastitis debido a las preocupaciones de fabricación de la FDA, cambiando el enfoque a su producto First Defense calf.