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RxNorm is US-specific terminology in medicine that contains all medications available on the US market. [1] It can also be used in personal health records applications.[ citation needed ] RxNorm is part of Unified Medical Language System (UMLS) terminology and is maintained by the United States National Library of Medicine (NLM). [2]
As of May 2017, [update] NLM provides six APIs related to RxNorm. [3] There is also a web application called RxMix that allows users to access the RxNorm APIs without writing their own programs. [4]