Several types of photosensitizers are used in cancer treatment, including: - Porphyrins: These are naturally occurring compounds and their derivatives, such as Photofrin. - Chlorins: These are modified porphyrins with improved properties, like Tookad. - Phthalocyanines: Synthetic compounds known for their high photoactivity and tumor selectivity. - 5-ALA (5-Aminolevulinic Acid): A precursor that is metabolized into the active photosensitizer, protoporphyrin IX, within cells.
