Process optimization of a novel immediate release film coating system using QbD principles

Area of Science:

• Pharmaceutical Technology
• Process Chemistry
• Materials Science

Background:

• Optimizing pharmaceutical coating processes is crucial for drug product quality and performance.
• Aqueous film coatings offer environmental benefits over solvent-based systems.
• Quality-by-Design (QbD) provides a systematic approach to process understanding and control.

Purpose of the Study:

• To apply Quality-by-Design (QbD) principles to establish optimal coating process conditions for an immediate release aqueous film coating system (Opadry® 200).
• To define a robust process operating space for the Opadry® 200 coating system.
• To identify critical quality attributes (CQAs) influencing coated tablet performance and appearance.

Main Methods:

• Utilized a design of experiments (DOE) protocol to systematically vary coating process parameters.
• Measured critical quality attributes (CQAs) including tablet appearance (color, defects, gloss) and disintegration time.
• Confirmed optimized process parameters through independent coating trials.

Main Results:

• Tablet appearance, specifically gloss, color uniformity, and defect levels, was identified as a critical quality attribute (CQA).
• Tablet gloss was positively influenced by lower spray rates, lower percent solids, and increased pan speed.
• Disintegration time was not significantly affected by the coating process conditions evaluated.
• High productivity and low defect levels were achieved across a broad range of Opadry® 200 coating conditions.

Conclusions:

• The study successfully established a robust operating space for Opadry® 200 aqueous film coating using QbD principles.
• Tablet appearance parameters are key CQAs that can be controlled by optimizing process conditions.
• The findings provide a scientific basis for reproducible and high-quality film coating processes in pharmaceutical manufacturing.