Related Experiment Videos
Crystal habit and tableting behavior
Norbert Rasenack1, Bernd W Müller
1Department of Pharmaceutics and Biopharmaceutics, Christian Albrecht University Kiel, Gutenbergstrasse 76, D-24118 Kiel, Germany.
International Journal of Pharmaceutics
|September 3, 2002
Summary
Crystal habit significantly impacts drug tableting. Researchers identified optimal ibuprofen and acetaminophen crystal forms for direct compression, minimizing excipient use and improving tablet stability and manufacturability.
Area of Science:
- Pharmaceutical Sciences
- Materials Science
- Chemical Engineering
Background:
- Drug crystal habit influences critical tableting properties such as flowability, compressibility, and compaction.
- Optimizing crystal habit is essential for developing efficient direct compression formulations, reducing reliance on excipients.
- Common analgesics like ibuprofen and acetaminophen present challenges in tableting due to their variable crystal morphologies.
Purpose of the Study:
- To investigate the effect of different crystal habits of ibuprofen and acetaminophen on their tableting behavior.
- To identify specific crystal forms suitable for direct compression with minimal excipient addition.
- To develop and validate a rapid, reproducible method for assessing tableting performance.
Main Methods:
- Preparation of distinct crystal habits (plate-shaped, needle-shaped, prismatic) for ibuprofen and acetaminophen, including variations in particle size.
- Characterization of tableting behavior, focusing on compact stability at low punch forces, flowability, and adhesion.
- Development and application of a comparative T-factor, derived from punch force/displacement profiles and compact properties, for quantitative assessment.
Main Results:
- Plate-shaped ibuprofen crystals demonstrated superior tableting properties compared to needle-shaped forms.
- For acetaminophen, specific crystal habits and particle sizes were identified as favorable for direct compression.
- The T-factor proved effective in rapidly and reproducibly evaluating the tableting behavior of different substances, including common excipients.
Conclusions:
- Tailoring crystal habit is a viable strategy to enhance the direct compression suitability of ibuprofen and acetaminophen.
- The developed T-factor method offers a valuable tool for rapid screening of drug candidates and excipients for tableting.
- This research facilitates the development of more efficient and cost-effective tablet manufacturing processes.