Abstract
The aim of this study was to investigate the influence of the production method and the polymeric carrier on the ability to generate and maintain the supersaturation of a poorly soluble drug in biorelevant medium. The amorphous solid dispersion of sulfamethoxazole, an antibacterial drug, was produced using two different polymers by spray-drying or hot melt extrusion methods. When Eudragit EPO was used, supersaturation was maintained up to 24 h for both techniques at all drug-polymer proportions. However, when Soluplus was employed in hot melt extrusion, a smaller amount of drug was dissolved when compared to the amorphous drug. The proportion of 3:7 drug-Eudragit EPO (w/w) produced by spray-drying presented a higher amount of drug dissolved in supersaturation studies and it was able to maintain the physical stability under different storage conditions throughout the 90-day evaluation. Supersaturation generation and system stability were found to be related to more effective chemical interaction between the polymer and the drug provided by the production method, as revealed by the 1D ROESY NMR experiment. Investigation of drug-polymer interaction is critical in supersaturating drug delivery systems to avoid crystallization of the drug and to predict the effectiveness of the system. Chemical compounds studied in this article: Sulfamethoxazole (PubChem CID: 4539) and Methacrylate copolymer — Eudragit EPO (PubChem CID: 65358)
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Abbreviations
- API:
-
Active pharmaceutical ingredients
- ASD:
-
Amorphous solid dispersion
- BCS:
-
Biopharmaceutical Classification System
- FaSSIF:
-
Fasted State Simulated Intestinal Fluid
- SDDS:
-
Supersaturating drug delivery systems
- SLM:
-
Sulfamethoxazole
- Soluplus:
-
Polyvinyl caprolactam–polyvinyl acetate–polyethylene glycol graft copolymer
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Acknowledgments
The authors would like to thank Dr. Adailton J. Bortoluzzi for technical support during XRPD analyses, Laboratório Central de Microscopia Eletrônica (LCME) for SEM measurements and Post-graduation Program in Chemistry of Universidade Federal de Santa Catarina for the facilities.
Funding
This study was supported by the Coordination for Enhancement of Higher Education Personnel (CAPES) — financial code 001.
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Mendes, C., Andrzejewski, R.G., Pinto, J.M.O. et al. Impact of Drug-Polymer Interaction in Amorphous Solid Dispersion Aiming for the Supersaturation of Poorly Soluble Drug in Biorelevant Medium. AAPS PharmSciTech 21, 189 (2020). https://doi.org/10.1208/s12249-020-01737-6
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DOI: https://doi.org/10.1208/s12249-020-01737-6