Light-activated drugs, also known as photodynamic therapy agents, are medications that become active when exposed to specific wavelengths of light. These drugs are often used in treating certain types of cancer and other medical conditions. When the light is applied, it triggers a chemical reaction that can destroy targeted cells, making it a precise treatment option. This approach relies on the use of photosensitizers, which are compounds that absorb light and produce reactive oxygen species. These reactive molecules can damage cellular components, leading to cell death. Light-activated drugs offer a promising alternative to traditional therapies, minimizing damage to surrounding healthy tissues.