Order for a medication that includes the dosage of a prescription in text

{
  "resourceType" : "MedicationRequest",
  "id" : "medrx002",
  "identifier" : [{
    "use" : "official",
    "system" : "http://www.bmc.nl/portal/prescriptions",
    "value" : "12345"
  }],
  "status" : "active",
  "intent" : "order",
  "medication" : {
    "reference" : {
      "reference" : "Medication/med0316",
      "display" : "prescribed medication"
    }
  },
  "subject" : {
    "reference" : "Patient/pat1",
    "display" : "Donald Duck"
  },
  "encounter" : {
    "reference" : "Encounter/f001",
    "display" : "encounter that leads to this prescription"
  },
  "authoredOn" : "2015-03-01",
  "requester" : {
    "reference" : "Practitioner/f007",
    "display" : "Patrick Pump"
  },
  "reason" : [{
    "concept" : {
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "59621000",
        "display" : "Essential hypertension (disorder)"
      }]
    }
  }],
  "dosageInstruction" : [{
    "sequence" : 1,
    "text" : "Take one tablet daily as directed"
  }]
}