FIELD: medicine, pharmaceutics.
SUBSTANCE: present invention refers to a crossed-linked chitosan composition. The composition contains chitosan with a degree of deacetylation 30-75% and a cross-linking agent. Chitosan is randomly deacetylated. The molar ratio of the cross-linking agent to chitosan makes 0.2:1 or less at a number of functional groups in the cross-linking agent and a number of deacetylated amino groups in chitosan. The invention also represents chitosan hydrogel made of the specified composition, a method for preparing it and the versions of using it.
EFFECT: invention provides higher bioavailability of the active ingredient and ensures that hydrogel has storage-stability of the visco-elastic properties of a plastic solid.
15 cl, 1 dwg, 18 ex
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