BNF, or British National Formulary, is a reference book that provides information on medications available in the United Kingdom. It includes details about drug dosages, side effects, interactions, and guidelines for prescribing. The BNF is widely used by healthcare professionals to ensure safe and effective medication use. The BNF is updated regularly to reflect new research and changes in medical practice. It serves as a vital resource for doctors, pharmacists, and nurses, helping them make informed decisions about patient care. The BNF is also available online, making it easily accessible for professionals in various healthcare settings.