Request for Over the Counter Medication - Tylenol PM - with dosage range as needed with pre-condition for use

{
  "resourceType": "MedicationRequest",
  "id": "medrx0310",
  "text": {
    "status": "generated",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative with Details</b></p><p><b>id</b>: medrx0310</p><p><b>contained</b>: </p><p><b>identifier</b>: 12345689 (OFFICIAL)</p><p><b>status</b>: active</p><p><b>intent</b>: order</p><p><b>medication</b>: id: med0309; Tylenol PM <span>(Details : {http://hl7.org/fhir/sid/ndc code '50580-506-02' = 'n/a', given as 'Tylenol PM'})</span></p><p><b>subject</b>: <a>Donald Duck</a></p><p><b>encounter</b>: <a>encounter who leads to this prescription</a></p><p><b>authoredOn</b>: 15/01/2015</p><p><b>requester</b>: <a>Patrick Pump</a></p><p><b>dosageInstruction</b>: </p></div>"
  },
  "contained": [
    {
      "resourceType": "Medication",
      "id": "med0309",
      "code": {
        "coding": [
          {
            "system": "http://hl7.org/fhir/sid/ndc",
            "code": "50580-506-02",
            "display": "Tylenol PM"
          }
        ]
      }

  "resourceType" : "MedicationRequest",
  "id" : "medrx0310",
  "contained" : [{
    "resourceType" : "Medication",
    "id" : "med0309",
    "code" : {
      "coding" : [{
        "system" : "http://hl7.org/fhir/sid/ndc",
        "code" : "50580-608-02",
        "display" : "Tylenol PM Extra Strength, 1 BOTTLE in 1 CARTON (50580-608-02) > 100 TABLET, FILM COATED in 1 BOTTLE (package)"
      }],
      "text" : "Tylenol PM"

    }
  ],
  "identifier": [
    {
      "use": "official",
      "system": "http://www.bmc.nl/portal/prescriptions",
      "value": "12345689"

  }],
  "identifier" : [{
    "use" : "official",
    "system" : "http://www.bmc.nl/portal/prescriptions",
    "value" : "12345689"
  }],
  "status" : "active",
  "intent" : "order",
  "medication" : {
    "reference" : {
      "reference" : "#med0309"

    }
  ],
  "status": "active",
  "intent": "order",
  "medicationReference": {
    "reference": "#med0309"

  },
  "subject": {
    "reference": "Patient/pat1",
    "display": "Donald Duck"

  "subject" : {
    "reference" : "Patient/pat1",
    "display" : "Donald Duck"

  },
  "encounter": {
    "reference": "Encounter/f001",
    "display": "encounter who leads to this prescription"

  "encounter" : {
    "reference" : "Encounter/f001",
    "display" : "encounter who leads to this prescription"

  },
  "authoredOn": "2015-01-15",
  "requester": {
    "reference": "Practitioner/f007",
    "display": "Patrick Pump"

  "authoredOn" : "2015-01-15",
  "requester" : {
    "reference" : "Practitioner/f007",
    "display" : "Patrick Pump"

  },
  "dosageInstruction": [
    {
      "sequence": 1,
      "text": "Take 1-2 tablets once daily at bedtime as needed for restless legs",
      "additionalInstruction": [
        {
          "text": "Take at bedtime"
        }
      ],
      "timing": {
        "repeat": {
          "frequency": 1,
          "period": 1,
          "periodUnit": "d"
        }
      },
      "asNeededCodeableConcept": {
        "coding": [
          {
            "system": "http://snomed.info/sct",
            "code": "32914008",
            "display": "Restless Legs"
          }
        ]
      },
      "route": {
        "coding": [
          {
            "system": "http://snomed.info/sct",
            "code": "26643006",
            "display": "Oral Route"
          }
        ]

  "dosageInstruction" : [{
    "sequence" : 1,
    "text" : "Take 1-2 tablets once daily at bedtime as needed for restless legs",
    "additionalInstruction" : [{
      "text" : "Take at bedtime"
    }],
    "timing" : {
      "repeat" : {
        "frequency" : 1,
        "period" : 1,
        "periodUnit" : "d"
      }
    },
    "asNeededFor" : [{
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "32914008",
        "display" : "Restless Legs"
      }]
    }],
    "route" : {
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "26643006",
        "display" : "Oral Route"
      }]
    },
    "doseAndRate" : [{
      "type" : {
        "coding" : [{
          "system" : "http://terminology.hl7.org/CodeSystem/dose-rate-type",
          "code" : "ordered",
          "display" : "Ordered"
        }]

      },
      "doseAndRate": [
        {
          "type": {
            "coding": [
              {
                "system": "http://terminology.hl7.org/CodeSystem/dose-rate-type",
                "code": "ordered",
                "display": "Ordered"
              }
            ]
          },
          "doseRange": {
            "low": {
              "value": 1,
              "unit": "TAB",
              "system": "http://terminology.hl7.org/CodeSystem/v3-orderableDrugForm",
              "code": "TAB"
            },
            "high": {
              "value": 2,
              "unit": "TAB",
              "system": "http://terminology.hl7.org/CodeSystem/v3-orderableDrugForm",
              "code": "TAB"
            }
          }

      "doseRange" : {
        "low" : {
          "value" : 1,
          "unit" : "TAB",
          "system" : "http://terminology.hl7.org/CodeSystem/v3-orderableDrugForm",
          "code" : "TAB"
        },
        "high" : {
          "value" : 2,
          "unit" : "TAB",
          "system" : "http://terminology.hl7.org/CodeSystem/v3-orderableDrugForm",
          "code" : "TAB"

        }
      ]
    }
  ]

      }
    }]
  }]

}