Request for Over the Counter Medication - Tylenol PM - with dosage range as needed with pre-condition for use (id = "medrx0310")

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

<MedicationRequest xmlns="http://hl7.org/fhir">
  <id value="medrx0310"/> 
  <contained> 
    <Medication> 
      <id value="med0309"/> 
      <code> 
        <coding> 
          <system value="http://hl7.org/fhir/sid/ndc"/> 
          <code value="50580-608-02"/> 
          <display value="Tylenol PM Extra Strength, 1 BOTTLE in 1 CARTON (50580-608-02) &gt; 100 TABLET,
           FILM COATED in 1 BOTTLE (package)"/> 
        </coding> 
        <text value="Tylenol PM"/> 
      </code> 
    </Medication> 
  </contained> 
  <identifier> 
    <use value="official"/> 
    <system value="http://www.bmc.nl/portal/prescriptions"/> 
    <value value="12345689"/> 
  </identifier> 
  <status value="active"/> 
  <intent value="order"/> 
  <medication> 
    <reference> 
      <reference value="#med0309"/> 
    </reference> 
  </medication> 
  <subject> 
    <!--   Linked to the resource patient who needs the medication   -->
    <reference value="Patient/pat1"/> 
    <display value="Donald Duck"/> 
  </subject> 
  <encounter> 
    <!--   Linked to a resource Encounter between patient and practitioner  -->
    <reference value="Encounter/f001"/> 
    <display value="encounter who leads to this prescription"/> 
  </encounter> 
  <authoredOn value="2015-01-15"/> 
  <requester> 
    <reference value="Practitioner/f007"/> 
    <display value="Patrick Pump"/> 
  </requester> 
  <dosageInstruction> 
    <sequence value="1"/> 
    <text value="Take 1-2 tablets once daily at bedtime as needed for restless legs"/> 
    <additionalInstruction> 
      <text value="Take at bedtime"/> 
    </additionalInstruction> 
    <timing> 
      <repeat> 
        <frequency value="1"/> 
        <period value="1"/> 
        <periodUnit value="d"/> 
      </repeat> 
    </timing> 
    <asNeededFor> 
      <coding> 
        <system value="http://snomed.info/sct"/> 
        <code value="32914008"/> 
        <display value="Restless Legs"/> 
      </coding> 
    </asNeededFor> 
    <route> 
      <coding> 
        <system value="http://snomed.info/sct"/> 
        <code value="26643006"/> 
        <display value="Oral Route"/> 
      </coding> 
    </route> 
    <doseAndRate> 
      <type> 
        <coding> 
          <system value="http://terminology.hl7.org/CodeSystem/dose-rate-type"/> 
          <code value="ordered"/> 
          <display value="Ordered"/> 
        </coding> 
      </type> 
      <doseRange> 
        <low> 
          <value value="1"/> 
          <unit value="TAB"/> 
          <system value="http://terminology.hl7.org/CodeSystem/v3-orderableDrugForm"/> 
          <code value="TAB"/> 
        </low> 
        <high> 
          <value value="2"/> 
          <unit value="TAB"/> 
          <system value="http://terminology.hl7.org/CodeSystem/v3-orderableDrugForm"/> 
          <code value="TAB"/> 
        </high> 
      </doseRange> 
    </doseAndRate> 
  </dosageInstruction> 
</MedicationRequest>