*This version of the PS-CA Implementation Guide has been superseded by a newer version.
Other releases of the PS-CA Implementation Guide may be found on a table on the [Home Page of this Project](https://simplifier.net/PS-CA-R1).*

---
## {{page-title}}

Additional information on this profile (including the JSON & XML structure and detailed element descriptions) can be found at {{link:http://fhir.infoway-inforoute.ca/io/psca/StructureDefinition/medication-ca-ps}} 

### Profile 
{{tree:http://fhir.infoway-inforoute.ca/io/psca/StructureDefinition/medication-ca-ps, hybrid}}

### Extensions

None.

**Note:** An earlier revision of this implementation guide included the Canadian Baseline {{link:http://prescribeit.ca/fhir/StructureDefinition/ext-medication-strength-description}} extension.

### Key Differences between the IPS-UV and PS-CA 
**Must Support Differences:**

The following elements are considered Must Support in the {{link:http://hl7.org/fhir/uv/ips/StructureDefinition/Medication-uv-ips}} profile that are relaxed in this version of the PS-CA profile:
- ```Medication```
- ```Medication.code:atcClass```
- ```Medication.code:snomedClass```
- ```Medication.ingredient``` and sub-elements

    **Note**: Systems that support these elements are encouraged to send them in patient summaries

**Cardinality Differences:**

There are no cardinality differences between this profile and IPS-UV

**Vocabulary Differences:**

- ```Medication.code```
    -  optional slices added for {{link:https://fhir.infoway-inforoute.ca/ValueSet/prescriptiondrugform}}
(CCDD) codes, Health Canada Natural Product Number ({{link:http://fhir.infoway-inforoute.ca/io/psca/ValueSet/HealthCanadaNaturalProductNumber}}) codes
    - {{link:https://fhir.infoway-inforoute.ca/ValueSet/prescriptiondrugform}} indicated as preferred
- ```Medication.form```
    - optional slices added for SNOMED CT Canadian edition {{link:https://fhir.infoway-inforoute.ca/ValueSet/pharmaceuticaldoseformcode}},
Prescribe IT {{link:https://fhir.infoway-inforoute.ca/ValueSet/prescriptiondrugform}}
 (derived from HL7 v3)
    - {{link:https://fhir.infoway-inforoute.ca/ValueSet/pharmaceuticaldoseformcode}} indicated as preferred
- ```Medication.ingredient.itemCodeableConcept.coding```
    - optional slice added for SNOMED CT Canadian edition {{link:https://fhir.infoway-inforoute.ca/ValueSet/drugormedicamentsubstancecode}}
    - SNOMED CT Canadian edition {{link:https://fhir.infoway-inforoute.ca/ValueSet/drugormedicamentsubstancecode}} indicated as preferred

**Other differences between the IPS and PS-CA Include:**

- ```Medication.code```:
    - IPS datatype profile replaced with PS-CA datatype profile
    - Canadian vocabulary examples added
- ```Medication.form```:
    - IPS datatype profile replaced with PS-CA datatype profile
- ```Medication.ingredient.strength```:
    - IPS datatype profile replaced with PS-CA datatype profile