alexa Characterization of cellulosic hot-melt extruded films containing lidocaine.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Repka MA, Gutta K, Prodduturi S, Munjal M, Stodghill SP

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Abstract Hot-melt extrusion technology was used to produce thin films containing a model drug, lidocaine, and the cellulosic polymers hydroxypropyl cellulose (HPC) and hydroxypropyl methyl cellulose (HPMC). Two film formulations were extruded and compared, one containing only HPC and the other containing HPC:HPMC (80:20). Thermal analysis of the films using differential scanning calorimetry (DSC) suggested that the drug existed in the amorphous condition, which was confirmed by wide angle X-ray diffractometry. Sustained release of the drug was observed from both of the polymer matrices. Dissolution profiles suggested that HPMC retarded the drug release from HPC:HPMC (80:20) films. However, the mechanism of drug release from both of the films was predominantly diffusion of the drug through the polymer matrices. Incorporation of HPMC also increased both adhesive strength and work of adhesion as compared to the HPC-only films. This article was published in Eur J Pharm Biopharm and referenced in Journal of Addiction Research & Therapy

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