What is Carac?
Fluorouracil () or 5-FU (trademarked as Adrucil (IV), Carac (topical), Efudex and Efudix (topical)) is a drug that is a pyrimidine analog which is used in the treatment of cancer. It is a suicide inhibitor and works through irreversible inhibition of thymidylate synthase. It belongs to the family of drugs called the antimetabolites.
It is on the World Health Organization's List of Essential Medicines, a list of the most important medications needed in a basic health system.