The index complements the existing search functionality by providing links to entries in the main body of the BNF text and to information in Appendices 6, 7 and 8 (Intravenous Additives, Borderline Substances, and Wound management products, respectively). Details in Appendix 1 (Interactions) and Appendices 2–5 (dealing with the use of medicines in liver disease, renal impairment, pregnancy and breast-feeding) are not indexed. These sections of the publication not covered by the index are easily accessed by browsing the main hierarchy or by using the full text search. In this respect the new index will also be useful for confirming the correct spelling of a term that can then be typed into the main search field.
Although results from clinical trials are mixed, the majority of evidence indicates that enteric-coated peppermint oil may be modestly effective in reducing some of the common symptoms of IBS. In combination with caraway oil, it also may be effective in treating non-ulcer dyspepsia. Limited data show a modest effect at reducing colonic spasm during barium enema. Topical peppermint oil also may be helpful for treatment of tension headache. Peppermint oil should only be used at the recommended doses because significant toxicity can occur at higher doses. Even the recommended medicinal doses of peppermint oil should not be used in infants or very young children, or in women who are pregnant or lactating.