Method of producing sustained-release preparation

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Particulate form

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424 854, 424484, 514 2, 514 21, 514964, A61K 914

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active

055342698

ABSTRACT:
A method of producing a sustained-release preparation which includes permitting a water-soluble polypeptide to permeate into a biodegradable matrix in the aqueous solution. The production method of the present invention makes possible the permeation of a water-soluble polypeptide into a biodegradable matrix without bringing the water-soluble polypeptide into contact with an organic solvent. Hence the water-soluble polypeptide is prepared without affecting the water-soluble polypeptide bioactivity and is thus effective for use as a pharmaceutical.

REFERENCES:
patent: 4962091 (1990-10-01), Eppstein et al.
A. Supersaxo et al., "Preformed porous microspheres for controlled and pulsed release of macro-molecules", Journal of Controlled Release, vol. 23, (1993), pp. 157-164.

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