STABLE PHARMACEUTICAL FORMULATION FOR ORAL ADMINISTRATION COMPRISING LEVOCETIRIZINE OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF, AND MONTELUKAST OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF

摘要

The present invention relates to a pharmaceutical formulation for oral administration for preventing or treating allergic rhinitis or asthma, which comprises: (a) a first particle part comprising levocetirizine or a pharmaceutically acceptable salt thereof and an organic acid; and (b) a second particle part comprising montelukast or a pharmaceutically acceptable salt thereof. The pharmaceutical formulation according to the present invention comprises an organic acid as a stabilizing agent, which can effectively inhibit the production of levocetirizine and montelukast related substances, and thus, show good stability.