The present invention provides a photosensitizing composition for treatment of MRSA comprising a photosensitizer and chlorhexidine and a pharmaceutically acceptable carrier. The present invention also provides a method for reducing disease causing microbes comprising: applying the composition comprising a photosensitizer, chlorhexidine at a concentration of more than about 0.01% and less than about 2% v/v, and a pharmaceutically acceptable carrier to a treatment site and applying light to the treatment site at a wavelength absorbed by the photosensitizer so as to reduce the microbes at the treatment site.
