Sustained-release pharmaceutical composition

Details Sustained-release pharmaceutical composition Sustained-release pharmaceutical composition

A - Human Necessities

61

K

A61K 47/34 (2006.01) A61K 9/22 (2006.01) A61K 9/52 (2006.01) A61K 9/70 (2006.01)

Patent

CA 2259098

The present invention relates to a sustained-release pharmaceutical composition comprising a hydroxyalkanoic acid copolymer consisting of a 3-hydroxybutyric acid unit and a 4-hydroxybutyric acid unit, and a biologically active substance. The sustained-release pharmaceutical composition of the present invention can regulate the degree of release of a biologically active agent easily by changing the ratio of the 3-hydroxybutyric acid (3HB) component to the 4-hydroxybutyric acid (4HB) component in P(3HB-co-4HB) as a basic substance and by changing the thickness of its sheet.

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