A Comprehensive Approach To Improving Solubility And Bioavailability: Spray Drying

Amorphous materials possess inherently high free energy, making stabilization essential to maintain their performance. One effective approach is spray drying, which enables the formation of amorphous solid dispersions (ASDs) that enhance the bioavailability of poorly water-soluble compounds. In these systems, drug–polymer interactions play a critical role in inhibiting recrystallization in both the solid state and during dissolution. In solution, these interactions can increase the concentration of free drug, often leading to improved in vivo exposure. As a result, an early and crucial step in spray drying development is identifying the optimal drug–polymer combination to maximize these interactions.

Spray drying itself is a well-established and versatile manufacturing technology with applications spanning the food, industrial, and pharmaceutical sectors. Since its first patent in 1865 (U.S. Patent 51,236), the technology has evolved significantly. Today’s advanced spray drying systems enable the development of highly engineered drug formulations, meeting stringent morphological requirements to ensure product performance, stability, and scalability in manufacturing.