This code system http://hl7.org/fhir/CodeSystem/medication-usage-status defines the following codes:

Code Display Definition
recorded Recorded The action of recording the medication statement is finished.
entered-in-error Entered in Error Some of the actions that are implied by the medication usage may have occurred. For example, the patient may have taken some of the medication. Clinical decision support systems should take this status into account.
draft Draft The medication usage is draft or preliminary.
<status value="active"/> <experimental value="false"/> <description value="MedicationUsage Status Codes"/> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> <code value="001"/> <display value="World"/> </coding> </jurisdiction> <caseSensitive value="true"/> <valueSet value="http://hl7.org/fhir/ValueSet/medication-usage-status"/> <content value="complete"/> <concept> <code value="recorded"/> <display value="Recorded"/> <definition value="The action of recording the medication statement is finished."/> </concept> <concept> <code value="entered-in-error"/> <display value="Entered in Error"/> <definition value="Some of the actions that are implied by the medication usage may have occurred. For example, the patient may have taken some of the medication. Clinical decision support systems should take this status into account."/> </concept> <concept> <code value="draft"/> <display value="Draft"/> <definition value="The medication usage is draft or preliminary."/> </concept> </CodeSystem>