Request with multiple dosages and timings. (id = "medrx004")

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

<MedicationRequest xmlns="http://hl7.org/fhir">
  <id value="medrx004"/> 
  <contained> 
    <Medication> 
      <id value="med0312"/> 
      <code> 
        <coding> 
          <system value="http://snomed.info/sct"/> 
          <code value="116805008"/> 
          <display value="Immune serum globulin administration by intravascular infusion"/> 
        </coding> 
        <text value="GAMMAGARD Liquid"/> 
      </code> 
    </Medication> 
  </contained> 
  <identifier> 
    <use value="official"/> 
    <system value="http://www.bmc.nl/portal/prescriptions"/> 
    <value value="12345689"/> 
  </identifier> 
  <status value="completed"/> 
  <intent value="order"/> 
  <medication> 
    <reference> 
      <reference value="#med0312"/> 
      <display value="Nystatin 100,000 u/ml oral suspension"/> 
    </reference> 
  </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> 
  <dosageInstruction> 
    <sequence value="1"/> 
    <text value="Administer in 100cc NS as follows: First treatment infuse over 90 minutes, if no
     reaction then second treatment infuse over 60 minutes, if no reaction then on third
     and following treatments give over 30 minutes."/> 
    <timing> 
      <event value="2023-01-18T00:00:00.000Z"/> 
    </timing> 
    <route> 
      <coding> 
        <system value="http://flatiron.com/CodeSystem/Route"/> 
        <code value="IV"/> 
      </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="5"/> 
        <unit value="mg/kg"/> 
      </doseQuantity> 
    </doseAndRate> 
    <doseAndRate> 
      <type> 
        <coding> 
          <system value="http://terminology.hl7.org/CodeSystem/dose-rate-type"/> 
          <code value="calculated"/> 
          <display value="Calculated"/> 
        </coding> 
      </type> 
      <doseQuantity> 
        <value value="340"/> 
        <unit value="mg"/> 
      </doseQuantity> 
    </doseAndRate> 
  </dosageInstruction> 
</MedicationRequest>