Dispense for Nasonex Inhaler (RxNorm Code) - in progress with additionalInstructions as text

{
  "resourceType" : "MedicationDispense",
  "id" : "meddisp0328",
  "status" : "in-progress",
  "medication" : {
    "concept" : {
      "coding" : [{
        "system" : "http://www.nlm.nih.gov/research/umls/rxnorm",
        "code" : "1797870",
        "display" : "mometasone furoate 0.05 MG/ACTUAT Metered Dose Nasal Spray [Nasonex]"
      }]
    }
  },
  "subject" : {
    "reference" : "Patient/pat1",
    "display" : "Donald Duck"
  },
  "performer" : [{
    "actor" : {
      "reference" : "Practitioner/f006"
    }
  }],
  "authorizingPrescription" : [{
    "reference" : "MedicationRequest/medrx0321"
  }],
  "type" : {
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/v3-ActCode",
      "code" : "EM",
      "display" : "Emergency Supply"
    }]
  },
  "quantity" : {
    "value" : 30,
    "system" : "http://unitsofmeasure.org",
    "code" : "ml"
  },
  "daysSupply" : {
    "value" : 30,
    "unit" : "Day",
    "system" : "http://unitsofmeasure.org",
    "code" : "d"
  },
  "whenPrepared" : "2015-01-15T10:20:00Z",
  "dosageInstruction" : [{
    "sequence" : 1,
    "text" : "Use two sprays twice daily",
    "additionalInstruction" : [{
      "text" : "Shake Well"
    }],
    "timing" : {
      "repeat" : {
        "frequency" : 2,
        "period" : 1,
        "periodUnit" : "d"
      }
    },
    "doseAndRate" : [{
      "type" : {
        "coding" : [{
          "system" : "http://terminology.hl7.org/CodeSystem/dose-rate-type",
          "code" : "ordered",
          "display" : "Ordered"
        }]
      },
      "doseQuantity" : {
        "value" : 1,
        "unit" : "ea",
        "system" : "http://terminology.hl7.org/CodeSystem/v3-orderableDrugForm",
        "code" : "NASINHL"
      }
    }]
  }]
}