Novel Dissolution Method for Oral Film Preparations with Modified Release Properties

Area of Science:

• Pharmaceutical Technology
• Drug Delivery Systems
• Analytical Chemistry

Background:

• Oromucosal film preparations are increasingly used in pharmaceutical development.
• Regulatory bodies require dissolution studies for oral films, but standardized methods are lacking.
• Existing methods often fail to accurately assess drug release from prolonged-release formulations.

Purpose of the Study:

• To develop a versatile dissolution test method for oral films with immediate and modified release profiles.
• To adapt a flow-through cell system with custom sample holders for oral film dissolution testing.
• To evaluate the method's ability to simulate physiological conditions of gastrointestinal transit.

Main Methods:

• Modified a conventional flow-through cell with in-house designed sample holders, including 3D-printed prototypes.
• Investigated four oral film types (ODF_IR, ODF_PR, ODF_DL) using anhydrous theophylline as a model drug.
• Simulated gastrointestinal transit by varying flow rates and dissolution media composition.

Main Results:

• The adapted flow-through cell system successfully determined drug release for various oral film types.
• Film sample holders with backing plates demonstrated the integrity of double-layer film shielding layers.
• Varying flow rates and media composition significantly impacted theophylline release, simulating physiological conditions.

Conclusions:

• The developed dissolution test method is suitable for evaluating both immediate and modified-release oral film preparations.
• The use of specialized fixtures, like sample holders with backing plates, is crucial for assessing film integrity and release profiles.
• The system's adaptability to different flow rates and media compositions allows for the simulation of in vivo conditions, aiding in predicting drug release behavior.