Process for producing a polymer of lactic acid - Glycolic Acid or a Salt thereof which comprises adding Water to an organic Solvent containing the polymer in a ratio of less than 1045 (in volume) of 100 of the Organic solvent. .

摘要

The object of the present Invention is to provide a sustained-release composition containing a physiologically active substance in High Content even when not includedGelatin, and suppresses their initial excessive Release and thus can achieve a Speed of stable release for approximately a month.Sustained Release composition containing a polymer of lactic acid - Glycolic Acid has a relationship or a Weight Average Molecular weight and Number Average Molecular WeightAbout 1.90 or less or a Salt thereof, and A physiologically active substance.