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Systematic classification of tablet disintegrants by water uptake and force development kinetics
Julian Quodbach1, Peter Kleinebudde
1Institute of Pharmaceutics and Biopharmaceutics, Heinrich-Heine-University, Duesseldorf, Germany.
The Journal of Pharmacy and Pharmacology
|June 20, 2014
Summary
A new apparatus simultaneously measures tablet water uptake and force development, aiding in understanding disintegration mechanisms. A modified Hill equation provides a simple classification for selecting appropriate disintegrants.
Area of Science:
- Pharmaceutical Sciences
- Materials Science
Background:
- Tablet disintegration is crucial for drug efficacy.
- Understanding disintegration mechanisms guides formulation development.
- Simultaneous measurement of water uptake and force offers deeper insights.
Purpose of the Study:
- To present a novel apparatus for simultaneous measurement of water uptake and force development during tablet disintegration.
- To analyze the data obtained from the apparatus to understand disintegration mechanisms.
- To develop a classification system for disintegrants based on their behavior.
Main Methods:
- A custom apparatus was constructed to measure water uptake (balance) and force development (texture analyzer) simultaneously.
- Dibasic calcium phosphate tablets with 2% disintegrant were investigated.
- Disintegration curves were analyzed using a modified Hill equation.
Main Results:
- The apparatus successfully confirmed known disintegration mechanisms like swelling and shape recovery.
- Different brands of polacrilin potassium exhibited distinct disintegration mechanisms.
- All experimental curves were accurately fitted using the modified Hill equation.
- A novel classification system for disintegrants was proposed based on the fit parameters.
Conclusions:
- The developed apparatus enables simultaneous acquisition of critical disintegration data.
- The modified Hill equation parameters offer a straightforward method for classifying disintegrant behavior.
- This classification aids in the rational selection of disintegrants for optimal tablet performance.
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