| abstract |
The present invention provides a method for preparing a sustained-release pharmaceutical composition, which comprises granulating a drug and a cellulose derivative in a low alkyl alcohol solvent, thereby preventing the oxyalkylene polymer from undergoing granulation or granulation, that is, A better uniformity effect can be achieved. Further, the present invention has the advantage of better uniformity in the sustained release pharmaceutical composition obtained by the above preparation method by the cellulose derivative of a specific viscosity range. |