The United States Pharmacopeia formulary has published a monograph for triclosan that sets purity standards. The British National Formulary is the core guide for pharmacists and clinicians. The guide contains information about branded and generic drugs in the UK formulary. Together with the "British National Formulary" (BNF), the "British Pharmacopoeia" defines the UK's pharmaceutical standards. Metformin became available in the British National Formulary in 1958. The complex pricing structure of the formulary can have unexpected consequences. Azopropazone has now been discontinued in the British National Formulary. The "Formula of Submission for the Jansenists" was the basis of the Formulary Controversy. It was also part of the National Formulary in the United States and United Kingdom. They pointed out that the only fixed and sure sacramental formulary is the baptismal rite. Side effects listed in the British National Formulary include flushing, palpitations, weakness and vomiting. Anal ulceration is now included in the British National Formulary as a reported side effect. The complete National Core Formulary can be found on the IHS website. It has an 840 item product portfolio based on the regional formulary. The fifth version in 1957 saw its name change to "The British National Formulary".