Taisho Pharmaceutical Co., Ltd.

Tomoaki Yoshino

Tohru Nagahama

A W/O/W type composite emulsion, wherein a W/O type emulsion containing water, an oil ingredient and a lipophilic emulsifier each in a proportion expressed in term of mass ratio falling within a range enclosed with bold lines in FIG.is dispersed in an external aqueous phase with a water-soluble macromolecule blended therein has a sufficient stability, and permits preserving a percent inclusion of medical substances included in an internal aqueous phase of the W/O/W type composite emulsion at a high level. Because of the characteristics, it is now possible to blend in a liquid formulation medical substances having an unfavorable taste or unstable medical substances which have to date hardly been included in liquid formulations with low viscosity, so that the W/O/W type composite emulsion can be utilized for liquid formulations including a liquid formulation for internal application, injections, etc.

Growing community of inventors

Tokyo, Japan

Tomoaki Yoshino