Effect of compressional force on tablets containing cellulosic disintegrators I: Dimensionless disintegration values

Area of Science:

• Pharmaceutical Sciences
• Materials Science

Background:

• Tablet formulation requires careful selection of excipients to ensure proper disintegration.
• Cellulosic materials, including microcrystalline cellulose and sodium carboxymethylcellulose, are commonly used as disintegrants in tablet formulations.
• The disintegration time of tablets is influenced by formulation factors such as the type of disintegrant, compressional force, and the pH of the disintegration medium.

Purpose of the Study:

• To investigate the disintegration behavior of spray-dried lactose tablets containing cellulosic disintegrants.
• To evaluate the effect of compressional force and pH on tablet disintegration times.
• To assess and compare the efficiency of different cellulosic disintegrants, including microcrystalline cellulose and internally cross-linked sodium carboxymethylcellulose.

Main Methods:

• Spray-dried lactose tablets were prepared with varying cellulosic disintegrants and compressed at different forces.
• United States Pharmacopeia (USP) disintegration times were measured under various pH conditions.
• Two dimensionless quantities were derived from disintegration time data to analyze formulation effects.
• The influence of compressional force and pH on disintegration was systematically studied.

Main Results:

• Disintegration times were found to be dependent on both compressional force and pH.
• The derived dimensionless quantities effectively characterized tablet disintegration behavior.
• Internally cross-linked sodium carboxymethylcellulose disintegrants demonstrated superior efficiency compared to other cellulosic materials.
• Disintegrant efficiency of sodium carboxymethylcellulose increased with higher compressional forces across all tested pH values.

Conclusions:

• The study successfully characterized the disintegration of spray-dried lactose tablets using cellulosic disintegrants.
• Compressional force and pH significantly impact tablet disintegration, necessitating optimization for specific formulations.
• Internally cross-linked sodium carboxymethylcellulose is a highly efficient disintegrant for spray-dried lactose tablets, with performance enhanced by increased compression.
• The developed dimensionless parameters offer a valuable tool for evaluating disintegrant performance in tablet formulations.