In medicine, an indication is a valid reason to use a certain test, medication, procedure, or surgery. There can be multiple indications to use a procedure or medication. An indication can commonly be confused with the term diagnosis. A diagnosis is a particular [medical] condition while an indication is a reason for use. Wikipedia
CDEK uses MeSH terms for drug indications. The Medical Subject Headings (MeSH) thesaurus is a controlled and hierarchically-organized vocabulary produced by the National Library of Medicine. It is used for indexing, cataloging, and searching of biomedical and health-related information.
MeSH terms are hierarchical, starting with high-level subjects (e.g. Diseases [C]), and becoming increasingly specific as you traverse down the tree.
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