How do some medicines cause skin sensitivity to the sun?

Weather of Arabia - Most people can enjoy the sun all year round, but when taking some medications, life in the sun can sometimes be less pleasant.

Some medications contain ingredients that may cause photosensitivity. These ingredients cause a chemical change in the skin, making a person sensitive to sunlight and can cause sunburn-like symptoms, rashes, or other unwanted side effects. It can be caused by products applied to the skin or by oral or injectable medications.