Patent ID: 7850993

Claim:
A method for production of a biodegradable polymer-based drug releasing system consisting of the steps of: 1) heat-melting polylactic acid having a weight-average molecular weight of 3,000-40,000 at 140-220° C., 2) allowing the melted polylactic acid prepared in step (1) to cool down to solidify at a temperature of about 20° C. to 30° C., 3) pulverizing the solidified polylactic acid prepared in step (2) into powder at about 20° C. to 30° C., and 4) mixing the powder prepared in step (3) with a powder of a biologically active compound at about 20° C. to 30° C. and compressing thus prepared mixture powder in a mold at about 20° C. to 30° C. to cause the polylactic acid to melt into a molded product of a predetermined shape.