Preparation of sustained-release pellets of sinomenine hydrochloride
Lingyan Jian
Abstract
Lingyan Jian
Abstract
OBJECTIVE To prepare the sinomenine hydrochloride sustained-release pellets and study its in vitro drug release.METHODS Uncoated pellets were prepared in a centrifugal granulator by Powder-laying method.Eudragit dispersions were coated as a sustained-release layer in a fluid-bed equipment.The release mechanism of the drug from the pellets was studied.RESULTS The main factors affecting the release rate were the type and the amount of the coating material applied.Release of the drug from pellets was in accordance with Higuchi equation: Y=0.093 8+0.084 6t(r=0.996 5).CONCLUSION The method and the formulation are successful in providing slow and steady release of sinomenine hydrochloride from sustained-release pellets.
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OBJECTIVE To prepare the sinomenine hydrochloride sustained-release pellets and study its in vitro drug release.METHODS Uncoated pellets were prepared in a centrifugal granulator by Powder-laying method.Eudragit dispersions were coated as a sustained-release layer in a fluid-bed equipment.The release mechanism of the drug from the pellets was studied.RESULTS The main factors affecting the release rate were the type and the amount of the coating material applied.Release of the drug from pellets was in accordance with Higuchi equation: Y=0.093 8+0.084 6t(r=0.996 5).CONCLUSION The method and the formulation are successful in providing slow and steady release of sinomenine hydrochloride from sustained-release pellets.
Key concepts: Pellets, Sinomenine, Chromatography, Chemistry, Pellet, Materials science, Coating, Pharmacology