Cyclodextrin Complexation of Fenofibrate by Co-Grinding Method and Monitoring the Process Using Complementary Analytical Tools

• Published in: Pharmaceutics 2022-06, Vol.14 (7), p.1329
• Main Authors: Kondoros, Balázs Attila, Berkesi, Ottó, Tóth, Zsolt, Aigner, Zoltán, Ambrus, Rita, Csóka, Ildikó
• Format: Article
• Language: English
• Subjects: Correlation analysis; DIMEB; DSC; FT-IR; Investigations; Laboratories; Methods; molecular complexation; Pharmaceuticals; Scanning electron microscopy; solvent-free method; Solvents; Spectrum analysis; XRPD
• ISSN: 1999-4923; 1999-4923
• DOI: 10.3390/pharmaceutics14071329

Solvent-free preparation types for cyclodextrin complexation, such as co-grinding, are technologies desired by the industry. However, in-depth analytical evaluation of the process and detailed characterization of intermediate states of the complexes are still lacking in areas. In our work, we aimed to apply the co-grinding technology and characterize the process. Fenofibrate was used as a model drug and dimethyl-β-cyclodextrin as a complexation excipient. The physical mixture of the two substances was ground for 60 min; meanwhile, samples were taken. A solvent product of the same composition was also prepared. The intermediate samples and the final products were characterized with instrumental analytical tools. The XRPD measurements showed a decrease in the crystallinity of the drug and the DSC results showed the appearance of a new crystal form. Correlation analysis of FTIR spectra suggests a three-step complexation process. In vitro dissolution studies were performed to compare the dissolution properties of the pure drug to the products. Using a solvent-free production method, we succeeded in producing a two-component system with superior solubility properties compared to both the active ingredient and the product prepared by the solvent method. The intermolecular description of complexation was achieved with a detailed analysis of FTIR spectra.