A Comparative Study on Cyclodextrin Derivatives in Improving Oral Bioavailability of Etoricoxib as a Model Drug: Formulation and Evaluation of Solid Dispersion-Based Fast-Dissolving Tablets
Etoricoxib, as a model drug, has a poor solubility and dissolution rate. Cyclodextrin derivatives can be used to solve such a problem. A comparative study was run on three cyclodextrin derivatives, namely β-CD, HP β-CD, and SBE β-CD, to solve the drug problem through the formulation of solid dispersions and their preparation into fast-dissolving tablets. Preparations utilized different (1:1, 1:2, and 1:4) drug:carrier ratios. Nine fast-dissolving tablets (containing 1:4 drug: carrier) were formulated using Prosolv ODT® and/or F-melt® type C as super-disintegrants. Optimized formulation was chosen based on a 32 factorial design. The responses chosen were the outcomes of the in vitro evaluation tests. The optimized formulation that had the highest desirability (0.86) was found to be SD-HP3, which was prepared from etoricoxib: HP β-CD at a 1:4 ratio using equal amounts of Prosolv ODT® and F-melt® type C. An in vivo evaluation of SD-HP3 on a rabbit model revealed its superiority over the marketed product Arcoxia®. SD-HP3 showed a significantly lower Tmax (13.3 min) and a significantly higher Cmax (9122.156 μg/mL), as well as a significantly higher AUC, than Arcoxia®. Thus, the solubility, dissolution, and bioavailability of etoricoxib were significantly enhanced.
2.1. Materials
A sample of etoricoxib was provided by Bright life Pharmaceuticals, Egypt, β-CD (water ≤14%), HP β-CD (DS of 4.9), SBE β-CD (water at least 4%, average DS of 6.5) (Sigma Aldrich—Burlington, MA, USA), F-melt® Type C (a gift sample from FUJI Chemical Industry Co., Ltd., Tokyo, Japan) Prosolv® ODT G2 (a gift sample from JRS Pharma, Rosenberg, Germany), and Ethanol 99.9% (Lab Chem, Cairo, Egypt). All the reagents used were of pharmaceutical grade.
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Elsegaie, D.; El-Nabarawi, M.A.; Mahmoud, H.A.; Teaima, M.; Louis, D. A Comparative Study on Cyclodextrin Derivatives in Improving Oral Bioavailability of Etoricoxib as a Model Drug: Formulation and Evaluation of Solid Dispersion-Based Fast-Dissolving Tablets. Biomedicines 2023, 11, 2440. https://doi.org/10.3390/biomedicines11092440