HALITOSIS ALLEVIATOR OR HALITOSIS PREVENTIVE

摘要

The present invention addresses the problem of providing a pharmaceutical preparation which invades little the human body and can selectively kill bacteria causative of halitosis.　According to the present invention, either a compound represented by formula (I) (wherein R¹ represents a hydrogen atom or an acyl or alkoxycarbonyl group and R² represents a hydrogen atom or an alkyl, cycloalkyl, cycloalkenyl, aryl, or aralkyl group) or a pharmacologically acceptable salt of the compound is administered to the inside of the mouth, which is thereafter irradiated with light having a wavelength of 360-700 nm.