Multicomponent Crystal of Trimethoprim and Citric Acid: Solid State Characterization and Dissolution Rate Studies

Authors

  • Salman Umar Department of Pharmaceutics, Faculty of Pharmacy, Universitas Andalas, Padang, Indonesia
  • Rido Farnandi Department of Pharmaceutics, Faculty of Pharmacy, Universitas Andalas, Padang, Indonesia
  • Hulwa Salsabila Department of Pharmaceutics, Faculty of Pharmacy, Universitas Andalas, Padang, Indonesia
  • Erizal Zaini Department of Pharmaceutics, Faculty of Pharmacy, Universitas Andalas, Padang, Indonesia

DOI:

https://doi.org/10.3889/oamjms.2022.7920

Keywords:

Trimethoprim, Citric acid, Multicomponent crystals, Solvent evaporation, Solubility, Dissolution rate

Abstract

BACKGROUND: Trimethoprim is a broad spectrum antimicrobial agent with low solubility in water which causes low bioavailability in systemic circulation.

AIM: The purpose of this study was to prepare multicomponent crystals of trimethoprim and citric acid to increase the solubility and dissolution rate of trimethoprim.

MATERIALS AND METHODS: Multicomponent crystals were prepared by solvent evaporation method. Characterizations of multicomponent crystalline solid phase properties were carried out by powder X-ray diffraction (PXRD) analysis, differential scanning calorimetry (DSC), FT-IR spectroscopy, scanning electron microscopy (SEM). Solubility and dissolution rate tests were carried out in aqueous medium.

RESULTS: The PXRD characterization results showed a new X-ray diffraction pattern in the multicomponent crystal phase. DSC analysis showed the formation of a new endothermic peak. This indicates the formation of a multicomponent crystal phase between trimethoprim and citric acid. The results of the SEM analysis indicate the formation of a new crystal habit. Solubility of multi-component crystal phase of trimethoprim increased 7 times compared to intact trimethoprim. The dissolution of trimethoprim and multicomponent crystals in 0.1 N HCl medium at 60 minutes was 56.36% and 95.57% and CO2-free distilled water medium was 43.03% and 88.26%, respectively.

CONCLUSIONS: From the results of the study, it can be concluded that the multicomponent phase of trimethoprim crystals with citric acid successfully increase the solubility and dissolution rate of trimethoprim significantly.

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Published

2022-01-15

How to Cite

1.
Umar S, Farnandi R, Salsabila H, Zaini E. Multicomponent Crystal of Trimethoprim and Citric Acid: Solid State Characterization and Dissolution Rate Studies. Open Access Maced J Med Sci [Internet]. 2022 Jan. 15 [cited 2024 Apr. 20];10(A):141-5. Available from: https://oamjms.eu/index.php/mjms/article/view/7920