Enhancement of the Oral Bioavailability of Fexofenadine Hydrochloride via Cremophor(®) El-Based Liquisolid Tablets

Advanced Pharmaceutical Bulletin
Soad Ali YehiaNolwa Gamal El-Sherif

Abstract

The current work aimed to develop promising Fexofenadine hydrochloride (FXD) liquisolid tablets able to increase its oral bioavailability and shorten time to reach maximum plasma concentrations (Tmax). Eighteen liquisolid powders were developed based on 3 variables; (i) vehicle type [Propylene glycol (PG) or Cremophor(®) EL (CR)], (ii) carrier [Avicel(®) PH102] to coat [Aerosil(®) 200] ratio (15, 20, 25) and (iii) FXD concentration in vehicle (30, 35, 40 %, w/w). Pre-compression studies involved identification of physicochemical interactions and FXD crystallinity (FT-IR, DSC, XRD), topographic visualization (SEM) and estimation of flow properties (angle of repose, Carr's index, Hausner's ratio). CR-based liquisolid powders were compressed as liquisolid tablets (LST 9 - 18) and evaluated for weight-variation, drug-content, friability-percentage, disintegration-time and drug-release. The pharmacokinetics of LST-18 was evaluated in healthy volunteers relative to Allegra(®) tablets. Pre-compression studies confirmed FXD dispersion in vehicles, conversion to amorphous form and formation of liquisolid powders. CR-based liquisolid powders showed acceptable-to-good flow properties suitable for compaction. CR-based LSTs had appropriate ...Continue Reading

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