Formulation, evaluation and characterization of fexofenadine IR and paracetamol SR multiparticulate drug delivery...

Multiparticulate Drug Delivery (MDD) system are particularly considered as well suited systems for controlling oral preparations that have low risk of dose-dumping.

The current research work was aimed to prepare Fexofenadine HCl immediate release (IR) and Paracetamol sustained release (SR) pellets in a single dosage unit for the treatment of Allergic Rhinitis. Extrusion-spheronization was used to fabricate pellets.

The formulations were analyzed for several parameters, including micromeritic studies, Friability, Weight variation test, Swelling, X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), in-vitro release and stability studies.

The results showed that the formulated pellets have an excellent flowability (23.01° to 25.23°), bulk density falls in the range of 1.23 g cm ^-3 to 1.42 g cm ^-3 , tapped density ranges 1.43 g/cm ³ 1.58 g/cm ³ , carr's compressibility index lie between 10.31 % to 15.17 %, Hausner's ratio ranges 1.11 to 1.18 which concluded pellets had good flow properties. Friability was less than 1%; the T6 formulation showed the maximum swelling of 99.28%. No interaction between excipient and drug was found. T6 showed a drug release of 99.08% in 24 hours.

The research effectively demonstrated that preparing a single-unit dosage form of paracetamol and fexofenadine is a safe, simple and promising technique for SR of Paracetamol, thereby increasing patient compliance by reducing the dosage frequency.