Liquid Medication - Phenytoin with link to prior prescription (id = "medrx0312")

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

<MedicationRequest xmlns="http://hl7.org/fhir">
  <id value="medrx0312"/> 
  <identifier> 
    <use value="official"/> 
    <system value="http://www.bmc.nl/portal/prescriptions"/> 
    <value value="12345689"/> 
  </identifier> 
  <priorPrescription> 
    <reference value="MedicationRequest/medrx0304"/> 
  </priorPrescription> 
  <status value="active"/> 
  <intent value="order"/> 
  <medication> 
    <concept> 
      <coding> 
        <system value="http://www.nlm.nih.gov/research/umls/rxnorm"/> 
        <code value="1313112"/> 
        <display value="phenytoin 25 MG/ML Oral Suspension"/> 
      </coding> 
    </concept> 
  </medication> 
  <subject> 
    <!--   Linked to the resource patient who needs the medication   -->
    <reference value="Patient/pat1"/> 
    <display value="Donald Duck"/> 
  </subject> 
  <authoredOn value="2015-01-15"/> 
  <requester> 
    <reference value="Practitioner/f007"/> 
    <display value="Patrick Pump"/> 
  </requester> 
  <reason> 
    <concept> 
      <coding> 
        <system value="http://snomed.info/sct"/> 
        <code value="230456007"/> 
        <display value="Status epilepticus (disorder)"/> 
      </coding> 
    </concept> 
  </reason> 
  <note> 
    <text value="Patient should be counselled to ensure good dental hygiene"/> 
  </note> 
  <dosageInstruction> 
    <sequence value="1"/> 
    <text value="100mg (4ml) three times daily"/> 
    <timing> 
      <repeat> 
        <frequency value="3"/> 
        <period value="1"/> 
        <periodUnit value="d"/> 
      </repeat> 
    </timing> 
    <route> 
      <coding> 
        <system value="http://snomed.info/sct"/> 
        <code value="26643006"/> 
        <display value="Oral Route (qualifier value)"/> 
      </coding> 
    </route> 
    <doseAndRate> 
      <type> 
        <coding> 
          <system value="http://terminology.hl7.org/CodeSystem/dose-rate-type"/> 
          <code value="ordered"/> 
          <display value="Ordered"/> 
        </coding> 
      </type> 
      <doseQuantity> 
        <value value="100"/> 
        <unit value="mg"/> 
        <system value="http://unitsofmeasure.org"/> 
        <code value="mg"/> 
      </doseQuantity> 
    </doseAndRate> 
  </dosageInstruction> 
  <dispenseRequest> 
    <validityPeriod> 
      <start value="2015-01-15"/> 
      <end value="2016-01-15"/> 
    </validityPeriod> 
    <numberOfRepeatsAllowed value="3"/> 
    <quantity> 
      <value value="360"/> 
      <unit value="mL"/> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="mL"/> 
    </quantity> 
    <expectedSupplyDuration> 
      <value value="30"/> 
      <unit value="days"/> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="d"/> 
    </expectedSupplyDuration> 
  </dispenseRequest> 
  <substitution> 
    <allowedBoolean value="true"/> 
    <reason> 
      <coding> 
        <system value="http://terminology.hl7.org/CodeSystem/v3-ActReason"/> 
        <code value="CT"/> 
        <display value="Continuing therapy"/> 
      </coding> 
    </reason> 
  </substitution> 
</MedicationRequest>