Comparative Evaluation of Pellet Cushioning Agents by Various Imaging Techniques and Dissolution Studies

Area of Science:

• Pharmaceutical technology
• Materials science
• Drug delivery systems

Background:

• Tablets are the most common oral drug dosage form.
• Compressing multiparticulate systems, especially coated particles, into tablets presents challenges to maintaining coating integrity and ensuring predictable drug release.
• The integrity of the coating on individual particles is crucial for controlled drug release.

Purpose of the Study:

• To investigate the impact of tableting on polymer-coated pellets.
• To evaluate various destructive and non-destructive imaging techniques for characterizing tableted coated pellets.
• To assess the suitability of microfocus X-ray (MFX) as a non-destructive method for analyzing coated pellets within tablets.

Main Methods:

• Polymer-coated pellets were compressed into tablets using different excipients (powder, granules, pellets).
• Tablet samples were analyzed using destructive (microscopic imaging) and non-destructive (microfocus X-ray [MFX], microCT) imaging methods.
• In vitro drug release profiles were evaluated independently.

Main Results:

• Image analysis results, using both stereomicroscopic and MFX images, correlated well with in vitro drug release data.
• MFX imaging provided information consistent with microscopic analysis of coated, tableted pellets.
• The microfocus X-ray (MFX) method proved to be a fast, easy-to-use, and non-destructive alternative for characterizing particulates within tablets.

Conclusions:

• The integrity of coated pellets after compression into tablets can be effectively assessed using imaging techniques.
• Microfocus X-ray (MFX) imaging is a viable and advantageous non-destructive method for analyzing the characteristics of compressed coated pellets.
• MFX imaging offers a reliable alternative to traditional microscopic analysis for quality control in tablet manufacturing involving multiparticulate systems.