Emerging technologies in pharmaceutical freeze‐drying

Freeze-drying, or lyophilisation, remains the preferred method for enhancing the stability of biopharmaceutical products. Despite its widespread use, traditional freeze-drying is limited by process inefficiencies and challenges in achieving batch uniformity. This chapter provides a comprehensive overview of recent technological advancements aimed at addressing these limitations and improving pharmaceutical freeze-drying. Alternative drying methods, such as ultrasound, infrared, and microwave-assisted processes, and unconventional approaches, including thin film and foam freeze-drying, are explored for their application to pharmaceutical formulations. Emerging continuous freeze-drying technologies, such as spin freeze-drying, suspended vial systems, and spray freeze-drying, are discussed. Innovations in container design and loading configurations are reviewed, emphasizing their impact on heat transfer and operational efficiency. The chapter also addresses recent progress in freeze-drying of oral solid formulations and highlights the integration of machine learning and artificial intelligence for enhanced process control, alongside current regulatory considerations.