get https://fhir-api.zapehr.com/r4b/MedicationRequest//_history/
MedicationRequest on the FHIR specification website.
An order or request for both supply of the medication and the instructions for administration of the medication to a patient. The resource is called "MedicationRequest" rather than "MedicationPrescription" or "MedicationOrder" to generalize the use across inpatient and outpatient settings, including care plans, etc., and to harmonize with workflow patterns.