Dissolution profile determination of a multicomponent product using a rapid liquid chromatographic analysis

Area of Science:

• Analytical Chemistry
• Pharmaceutical Science
• Drug Development

Background:

• Simultaneous analysis of multiple active pharmaceutical ingredients (APIs) in combination products presents analytical challenges.
• Overlapping UV spectra of APIs like metoprolol and hydrochlorothiazide hinder conventional spectrophotometric quantification.
• Accurate dissolution profiling is critical for assessing the in vivo performance and bioavailability of combination drug products.

Purpose of the Study:

• To develop and validate a novel analytical system for monitoring the dissolution profiles of individual active components in a two-component combination product.
• To overcome the limitations of conventional UV analysis due to significant spectral overlap between metoprolol and hydrochlorothiazide.
• To enable real-time, in-process monitoring of dissolution for combination drug products.

Main Methods:

• Development of a high-performance liquid chromatography (HPLC) method for the separation and quantification of metoprolol and hydrochlorothiazide.
• Integration of a six-station dissolution tester with the HPLC system for automated sample analysis.
• Optimization of HPLC parameters to achieve rapid separation and accurate quantitation within short time intervals.

Main Results:

• The developed HPLC method successfully resolved and quantified both metoprolol and hydrochlorothiazide, despite their considerable UV spectral overlap.
• The integrated dissolution testing and HPLC system demonstrated capability for real-time monitoring of dissolution profiles.
• The system could analyze six samples at 5-minute intervals, providing efficient and timely dissolution data.

Conclusions:

• The developed analytical system provides a robust and efficient solution for monitoring dissolution profiles of combination products with overlapping spectra.
• HPLC-based dissolution analysis offers a viable alternative to conventional methods, enabling accurate quantitation of individual APIs.
• This approach facilitates improved quality control and understanding of drug release characteristics for combination pharmaceutical formulations.