This value set includes codes based on the following rules:

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v2-0251 version 📦3.0.0

  Code	Display	Definition
  WP	Product withdrawn permanently	Product withdrawn permanently
  WT	Product withdrawn temporarily	Product withdrawn temporarily
  DR	Dosage changed	Product dose or frequency of use reduced
  DI	Dosage increased	Product dose or frequency of use increased
  N	None	None
  OT	Other	Other

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-NullFlavor version 📦4.0.0

  Code	Display	Definition
  UNK	Desconocida	**Description:**A proper value is applicable, but not known. **Usage Notes**: This means the actual value is not known. If the only thing that is unknown is how to properly express the value in the necessary constraints (value set, datatype, etc.), then the OTH or UNC flavor should be used. No properties should be included for a datatype with this property unless: 1. Those properties themselves directly translate to a semantic of "unknown". (E.g. a local code sent as a translation that conveys 'unknown') 2. Those properties further qualify the nature of what is unknown. (E.g. specifying a use code of "H" and a URL prefix of "tel:" to convey that it is the home phone number that is unknown.)
  NA	No aplicable	Known to have no proper value (e.g., last menstrual period for a male).

This value set contains 8 concepts