Definition

A drug that contains the active ingredient aminolevulinic acid hydrochloride and is used with photodynamic therapy to treat actinic keratosis (a skin condition that may become cancer). When Levulan Kerastick is taken up by abnormal cells, including cancer cells, and then exposed to certain types of light, it becomes active and kills the cells. Levulan Kerastick is a type of photosensitizing agent.