The British National Formulary (BNF) is a comprehensive reference book that provides essential information on medications used in the United Kingdom. It includes details on drug dosages, side effects, interactions, and guidelines for prescribing. The BNF is widely used by healthcare professionals, including doctors and pharmacists, to ensure safe and effective medication management. Published jointly by the Royal Pharmaceutical Society and the British Medical Association, the BNF is updated regularly to reflect new research and changes in clinical practice. It serves as a vital resource for maintaining high standards of patient care and promoting the safe use of medicines in the UK.