A novel superdisintegrating agent made from physically modified chitosan with silicon dioxide.

Area of Science:

• Pharmaceutical Science
• Materials Science

Background:

• Disintegrants and fillers are crucial excipients for immediate-release solid dosage forms.
• Current excipients often rely on water wicking and swelling for disintegration.
• There is a need for multifunctional excipients with improved performance characteristics.

Purpose of the Study:

• To develop and characterize a new excipient based on the coprecipitation of chitosan and silica.
• To evaluate its efficacy as a superdisintegrant and pharmaceutical filler.
• To compare its performance against existing superdisintegrants.

Main Methods:

• Coprecipitation of chitosan and silica to form a novel excipient.
• Characterization of the excipient's physical properties, including water uptake and gelling formation.
• Evaluation of its performance in tablet formulations, including disintegration, powder flow, and compaction.
• Assessment in wet granulation formulations.

Main Results:

• The chitosan-silica excipient demonstrated superior water uptake, saturation, and compactability compared to other superdisintegrants.
• Its functionality is not solely dependent on water wicking and swelling.
• It significantly improved disintegration characteristics, powder flow, and compaction properties.
• The excipient showed superior performance in wet granulation and was effective at all concentrations in tablet formulations.

Conclusions:

• The novel chitosan-silica excipient functions effectively as both a superdisintegrant and a pharmaceutical filler.
• It offers enhanced performance in immediate-release solid dosage forms, particularly in wet granulation.
• This material represents a significant advancement in pharmaceutical excipient technology.