Compiled with the advice of clinical experts this reference offers guidance on prescribing, dispensing and administering medicines. The British National Formulary (BNF) details all medicines on the UK market with special reference to their uses, cautions, contraindications, side-effects, dosage and relative costs. Updated every six months, the BNF is published jointly by the British Medical Association and the Royal Pharmaceutical Society of Great Britain under the authority of the Joint Formulary Committee.