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National Library of Medicine Technical BulletinNational Library of Medicine Technical Bulletin

Table of Contents: 2019 NOVEMBER–DECEMBER No. 431

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RxNorm December 2019 Release

RxNorm December 2019 Release. NLM Tech Bull. 2019 Nov-Dec;(431):b7.

2019 December 04 [posted]

The RxNorm December monthly release is available for download as of Monday, December 2, 2019. Units of measure on RxNorm normal forms for dietary supplements are changing beginning with the December release. The new Qualitative Distinction modifier "Micronized" is also included.

Units of measure on RxNorm normal forms for dietary supplements are changing to better align with recent guidance from the U.S. Food and Drug Administration (FDA). This is a long-term project and changes will occur as updated drug labels are received. Further information about the FDA guidance is available at the following link: https://www.fda.gov/food/cfsan-constituent-updates/fda-provides-guidance-industry-convert-units-measure-certain-nutrients-nutrition-and-supplement.

Qualitative Distinction (QD) modifiers allow flexibility in the RxNorm model to create a new RxNorm Concept Unique Identifier (RXCUI) when needed. The new QD "Micronized" distinguishes certain products containing the ingredient isotretinoin. The December 2019 release includes new QDs for the following active concepts:

RXCUI TTY String
2262729 SCD Micronized Isotretinoin 8 MG Oral Capsule
2262711 SCD Micronized Isotretinoin 16 MG Oral Capsule
2262714 SCD Micronized Isotretinoin 24 MG Oral Capsule
2262721 SCD Micronized Isotretinoin 28 MG Oral Capsule
2262725 SCD Micronized Isotretinoin 32 MG Oral Capsule
2262731 SBD Micronized Isotretinoin 8 MG Oral Capsule [Absorica]
2262713 SBD Micronized Isotretinoin 16 MG Oral Capsule [Absorica]
2262715 SBD Micronized Isotretinoin 20 MG Oral Capsule [Absorica]
2262719 SBD Micronized Isotretinoin 24 MG Oral Capsule [Absorica]
2262723 SBD Micronized Isotretinoin 28 MG Oral Capsule [Absorica]
2262727 SBD Micronized Isotretinoin 32 MG Oral Capsule [Absorica]

For each SCD or SBD with a QD, there is an associated attribute in RXNSAT with the attribute name (ATN) of 'RXN_QUALITATIVE_DISTINCTION'. The December release contains the following new attribute value (ATV) to match the QD strings found in the SCD and SBD normalized names:

  • Micronized

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