Design of Agglomerated Crystals of Ibuprofen During Crystallization: Influence of Surfactant

Document Type : Original Article

Authors

1 Drug applied Research Center, School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran

2 School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran

Abstract

Objective(s)
Ibuprofen is a problematic drug in tableting, and dissolution due to its poor solubility, hydrophobicity, and tendency to stick to surface. Because of the bad compaction behavior ibuprofen has to be granulated usually before tableting. However, it would be more satisfactory to obtain directly during the crystallization step crystalline particles that can be directly compressed and quickly dissolved.
Materials and Methods
Crystallization of ibuprofen was carried out using the quasi emulsion solvent diffusion method in presence of surfactant (sodium lauryl sulfate (SLS), Tween 80). The particles were characterized by differential scanning calorimetry (DSC), powder X-ray diffraction (XRPD) and were evaluated for particle size, flowability, drug release and tableting behavior.
Results
Ibuprofen particles obtained in the presence of surfactants consisted of numerous plate- shaped crystals which had agglomerated together as near spherical shape. The obtained agglomerates exhibited significantly improved micromeritic properties as well as tableting behavior than untreated drug crystals. The agglomerates size and size distribution was largely controlled by surfactant concentration, but there was no significant influence found on the tableting properties. The dissolution tests showed that the agglomerates obtained in presence of SLS exhibited enhanced dissolution rate while the agglomerates made in the presence of Tween 80 had no significant impact on dissolution rate of ibuprofen in comparison to untreated sample. The XRPD and DSC results showed that during the agglomeration process, ibuprofen did not undergo any polymorphic changes.
Conclusion
The study highlights the influence of surfactants on crystallization process leading to modified performance.

Keywords

References

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