A typical Medication allergy from a clinical system (id = "medication")

<?xml version="1.0" encoding="UTF-8"?>

<AllergyIntolerance xmlns="http://hl7.org/fhir">
  <id value="medication"/> 
  <clinicalStatus> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/allergyintolerance-clinical"/> 
      <code value="active"/> 
      <display value="Active"/> 
    </coding> 
  </clinicalStatus> 
  <verificationStatus> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/allergyintolerance-verification"/> 
      <code value="unconfirmed"/> 
      <display value="Unconfirmed"/> 
    </coding> 
  </verificationStatus> 
  <category value="medication"/> 
  <criticality value="high"/> 
  <!--   subtance, coded from RxNorm   -->
  <code> 
    <coding> 
      <system value="http://www.nlm.nih.gov/research/umls/rxnorm"/> 
      <code value="7980"/> 
      <display value="Penicillin G"/> 
    </coding> 
  </code> 
  <!--   the patient that actually has the risk of adverse reaction   -->
  <patient> 
    <reference value="Patient/example"/> 
  </patient> 
  <!--   the date that this entry was recorded   -->
  <recordedDate value="2010-03-01"/> 
  <!--   who made the record / last updated it   -->
  <recorder> 
    <reference value="Practitioner/example"/> 
  </recorder> 
  <reaction> 
    <manifestation> 
      <concept> 
        <coding> 
          <system value="http://snomed.info/sct"/> 
          <code value="247472004"/> 
          <display value="Hives"/> 
        </coding> 
      </concept> 
    </manifestation> 
  </reaction> 
</AllergyIntolerance>