Photosensitizing compositions for medical applications, namely, pharmaceuticals for the treatment of infectious diseases caused by bacteria, fungi, and/or virus; light-activated disinfectants; pharmaceutical compositions for killing disease-causing micro-organisms; light-activated therapeutic preparations for photodisinfection of cervix, vagina, and urinary tract; photosensitizers for use in photodynamic therapy and/or photodisinfection, namely, pharmaceuticals for the treatment of urinary tr...