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Updated: Sep 29, 2025

Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
Published on: August 28, 2015
Development and characterization of bilayered tablets of diazepam for oral drug delivery: design, optimization and in
Sara Salatin, Mitra Alami-Milani1,2, Hamit Cilvegar3
1Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
Abstract:
Aims: The oral bioavailability of drugs can be limited by their short residence time in the gastrointestinal tract. This study was performed to design bilayered floating tablets of diazepam comprising immediate-release and controlled-release layers. Methods: The tablets were prepared using sodium starch glycolate, polyvinyl pyrrolidone, hydroxypropyl methylcellulose and microcrystalline cellulose and evaluated for their characteristics. Results: The optimized formulation was found to be buoyant for 8 h on simulated gastric fluid. Hydroxypropyl methylcellulose K4M and microcrystalline cellulose sustained the release of diazepam from the controlled-release layer. The optimized formulation exhibited an extended release period of 8 h. Discussion/conclusion: It can be concluded that bilayered tablets of diazepam may extend the residence time of the drug at the site of absorption.
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