Bioadhesive ophthalmic insert
First Claim
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1. An ophthalmic insert useful for the prolonged and controlled release of at least one medicinal substance, which comprises a homogeneous mixture of a composite polymeric material matrix and the medicinal substance, said composite polymeric material matrix comprising a mixture of:
- a water-soluble biocompatible polymer selected from hydroxyalkyl celluloses, maltodextrins, chitosans, modified starches or polyvinyl alcohols,a water-insoluble biocompatible polymer selected from alkylcelluloses, anda bioadhesive biocompatible polymer selected from polyvinyl carboxylic acids or sodium carboxymethyl celluloses,said insert being prepared by extrusion, thermoforming or heat compression of said homogeneous mixture.
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Abstract
A bioadhesive ophthalmic insert is described which is intended more particularly for the prolonged and controlled release of a medicinal substance. The insert comprises a composite polymeric material matrix in which the medicinal substance is incorporated.
The composite polymeric material matrix comprises a water-soluble biocompatible polymer and a bioadhesive biocompatible polymer and, where applicable, a water-insoluble biocompatible polymer.
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11 Claims
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1. An ophthalmic insert useful for the prolonged and controlled release of at least one medicinal substance, which comprises a homogeneous mixture of a composite polymeric material matrix and the medicinal substance, said composite polymeric material matrix comprising a mixture of:
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a water-soluble biocompatible polymer selected from hydroxyalkyl celluloses, maltodextrins, chitosans, modified starches or polyvinyl alcohols, a water-insoluble biocompatible polymer selected from alkylcelluloses, and a bioadhesive biocompatible polymer selected from polyvinyl carboxylic acids or sodium carboxymethyl celluloses, said insert being prepared by extrusion, thermoforming or heat compression of said homogeneous mixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process for manufacturing an ophthalmic insert useful for the prolonged and controlled release of at least one medicinal substance, which comprises a matrix of a composite polymeric material in which the medicinal substance is incorporated, comprising forming a homogeneous mixture of:
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a water-soluble biocompatible polymer selected from hydroxyalkyl celluloses, maltodextrins, chitosans, modified starches or polyvinyl alcohols, a water-insoluble biocompatible polymer selected from alkylcelluloses, a bioadhesive biocompatible polymer selected from polyvinyl carboxylic acids or sodium carboxymethyl celluloses, and a medicinal substance, and extruding, thermoforming or heat compressing said polymeric mixture. - View Dependent Claims (11)
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Specification