In the MedicationDispense resource for FHIR dstu2 , the note attribute identifies the Information about the dispense
"note":
"status":
"dosageInstruction":
"whenPrepared":
"patient":
"quantity":
"type":
"daysSupply":
"authorizingPrescription":
"note":
"medicationReference":
"medicationCodeableConcept":
"substitution":
"dispenser":
"destination":
"identifier":
"whenHandedOver":
"receiver":