NDLI: Stabilization of hot-melt extrusion formulations containing solid solutions using polymer blends

Content Provider	Springer Nature Link
Author	Prodduturi, Suneela Urman, Kevin L. Otaigbe, Joshua U. Repka, Michael A.
Copyright Year	2007
Abstract	This study was aimed at enhancing the physical stability of the drug clotrimazole (CT) and the polymer contained within hot-melt extrusion (HME) films using polymer blends of hydroxypropyl cellulose (HPC) and poly(ethylene oxide) (PEO). The HME films were investigated for solid-state characteristics, moisture sorption, bioadhesivity, mechanical properties, glass transition temperature, release characteristics, and physical and chemical stability of the drug and the polymer within the HME films. The solid-state characterization of the drug and the polymer was performed using differential scanning calorimetry, x-ray diffractometry, and dynamic mechanical analysis. A texture analyzer was used to study the bioadhesive and mechanical properties of the HME films. The physical and chemical stability of the films, stored at 25°C/60% relative humidity or in a desiccator, was studied for up to 12 months. CT was found to be in solid solution within all of the formulations extruded. The physical stability of the drug and PEO in the HME films increased with increasing HPC concentration, but the bioadhesivity and flexibility of the PEO films decreased with increasing HPC concentration. Films containing HPC: PEO∶CT in the ratio of 55∶35∶10 demonstrated optimum physical-mechanical, bioadhesive, and release properties. In conclusion, polymer blends of HPC and PEO were used successfully to tailor the drug release, mechanical and bio-adhesive properties, and stability of the HME films.
Starting Page	E152
Ending Page	E161
File Format	PDF
Journal	AAPS PharmSciTech
Volume Number	8
Issue Number	2
e-ISSN	15309932
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-01-01
Publisher Institution	American Association of Pharmaceutical Scientists
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Solid solution physical stability hot-melt extrusion polymers physicochemical characterization Biotechnology Biochemistry Pharmacy Pharmacology/Toxicology
Content Type	Text
Resource Type	Article

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