Table of Contents: 2019 NOVEMBER–DECEMBER No. 431
RxNorm December 2019 Release. NLM Tech Bull. 2019 Nov-Dec;(431):b7.
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:
