Controlled release composition and method of producing the same

Details Controlled release composition and method of producing the same Controlled release composition and method of producing the same

2002-06-28

2008-09-30

Tate, Christopher R. (Department: 1654)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Peptide containing doai

Reexamination Certificate

active

07429559

ABSTRACT:
A controlled release composition containing a physiologically active substance in high content, suppressing the initial excess release, and achieving a stable release speed over a long period of time is provided.A controlled release composition comprising (1) a physiologically active substance or salt thereof in an amount of about 14% (w/w) to about 24% (w/w) based on the total composition weight, (2) hydroxynaphthoic acid selected from the group consisting of 3-hydroxy-2-naphthoic acid and 1-hydroxy-2-naphthoic acid or salt thereof, and (3) a lactic acid polymer or salt thereof having a weight-average molecular weight of 15000 to 50000 in which the content of polymers having molecular weights of 5000 or less is about 5% by weight or less, wherein the molar ratio of said hydroxynaphthoic acid or salt thereof to said physiologically active substance or salt thereof is from 3:4 to 4:3.

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