?.? Dosage Instruction Mappings 
This page provides mappings for Dosage Instruction.
?.?.1 Mappings for HL7 v2 Mapping (http://hl7.org/v2) 
| DosageInstruction | |
| sequence | |
| text | text |
| additionalInstructions | component.substanceAdministrationRequest.text |
| timing | effectiveTime |
| asNeeded[x] | boolean: precondition.negationInd (inversed - so negationInd = true means asNeeded=false CodeableConcept: precondition.observationEventCriterion[code="Assertion"].value |
| site | approachSiteCode |
| route | routeCode |
| method | methodCode |
| dose[x] | doseQuantity |
| maxDosePerPeriod | maxDoseQuantity |
| maxDosePerAdministration | no mapping |
| maxDosePerLifetime | no mapping |
| rate[x] | rateQuantity |