Inline UV/Vis spectroscopy as PAT tool for hot-melt extrusion.

Area of Science:

• Pharmaceutical Manufacturing
• Process Analytical Technology (PAT)
• Quality by Design (QbD)

Background:

• Hot-melt extrusion (HME) is a continuous pharmaceutical manufacturing process.
• Solid dispersions, a key HME application, involve distributing active pharmaceutical ingredients (APIs) within a polymer matrix.
• Monitoring drug content is crucial for ensuring product quality in solid dispersions.

Purpose of the Study:

• To evaluate an inline UV/Vis spectrometer as a PAT tool for quantifying drug load during HME.
• To assess the performance of the PAT tool in accordance with ICH Q2 guidelines.
• To demonstrate real-time monitoring capabilities for critical quality attributes.

Main Methods:

• Implementation of an inline UV/Vis spectrometer on an early development twin-screw extruder.
• Testing with carbamazepine and theophylline APIs and copovidone polymer matrix.
• Univariate data analysis for drug load quantification.

Main Results:

• The inline UV/Vis spectrometer accurately quantified drug load within typical pharmaceutical ranges.
• The PAT tool demonstrated suitability for real-time data acquisition with a 1 Hz measurement frequency.
• Minimal effort was required for data evaluation.

Conclusions:

• The inline UV/Vis spectrometer is a suitable PAT tool for monitoring drug content in pharmaceutical HME.
• This technology supports Quality by Design principles through real-time quality attribute monitoring.
• The system facilitates efficient and accurate drug load quantification for continuous manufacturing.