| Source Element | Usage | Target |
| MedicinalProductUndesirableEffect | UseExtension | http://hl7.org/fhir/4.0/StructureDefinition/extension-MedicinalProductUndesirableEffect |
| MedicinalProductUndesirableEffect.id | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.meta | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.implicitRules | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.language | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.text | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.contained | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.extension | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.modifierExtension | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.subject | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.symptomConditionEffect | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.classification | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.frequencyOfOccurrence | UseExtensionFromAncestor | - |
| MedicinalProductUndesirableEffect.population | UseExtensionFromAncestor | - |