Describes the event of a patient consuming or otherwise being given a dose of administered a medication. This may be as simple as swallowing a tablet or it may be a long running infusion. Related resources tie this event to the authorizing prescription, and the specific encounter between patient and health care practitioner.

External identifier - FHIR will generate its own internal IDs identifiers (probably URLs) which do not need to be explicitly managed by the resource. The identifier here is one that would be used by another non-FHIR system - for example an automated medication pump would provide a record each time it operated; an administration while the patient was off the ward might be made with a different system and entered after the event. Particularly important if these records have to be updated.

Will generally be set to show that the administration has been completed. For some long running administrations such as infusions it is possible for an administration to be started but not completed or it may be paused while some other process is under way.

The person or animal to whom receiving the medication was given. medication.

The individual who was responsible for giving the medication to the patient.

The visit or visit, admission the or other contact between patient and health care provider the medication administration was performed as part of.

The original request, instruction or authority to perform the administration.

Set this to true if the record is saying that the medication was NOT administered.

A code indicating why the administration was not performed.

A code indicating why the medication was given.

A specific date/time or interval of time during which the administration took place. place (or did not take place, when the 'notGiven' attribute is true). For many administrations, such as swallowing a tablet the lower and upper values use of the interval will be the same. dateTime is more appropriate.

Identifies the medication that was administered. This is either a link to a resource representing the details of the medication or a simple attribute carrying a code that identifies the medication from a known list of medications.

If only a code is specified, then it needs to be a code for a specific product. If more information is required, then the use of the medication resource is recommended. Note: do not use Medication.name to describe the administered medication. When the only available information is a text description of the medication, Medication.code.text should be used.

The device used in administering the medication to the patient. E.g. For example, a particular infusion pump.

Extra information about the medication was administered. administration that is not conveyed by the other attributes.

Describes the medication to the patient. This may be a single time point (using dateTime) or it may be a start and end dateTime (Period). dosage information details e.g. dose, rate, site, route, etc.

Free text dosage instructions can be used for cases where the specified schedule rather than at every scheduled dose. If a CodeableConcept is instructions are too complex to code. When coded instructions are present, it indicates the pre-condition free text instructions may still be present for display to humans taking or administering the Medication. medication.

A coded specification of the anatomic site where the medication first entered the body. E.g. For example, "left arm".

A code specifying the route or physiological path of administration of a therapeutic agent into or onto the patient. E.g. For example, topical, intravenous, etc.

A coded value indicating the method by which the medication is intended to be or was introduced into or onto on the body. Most This attribute will most often NOT be populated. It is most commonly used for injections. Examples: For example, Slow Push; Push, Deep IV. Terminologies used often pre-coordinate this term with the route and or form of administration.

One of the reasons this attribute is not used often, is that the method is often pre-coordinated with the route and/or form of administration. This means the codes used in route or form may pre-coordinate the method in the route code or the form code. The implementation decision about what coding system to use for route or form code will determine how frequently the method code will be populated e.g. if route or form code pre-coordinate method code, then this attribute will not be populated often; if there is no pre-coordination then method code may be used frequently.

The amount of the medication given at one administration event. Use this value when the administration is essentially an instantaneous event such as a swallowing a tablet or giving an injection.

If the administration is not instantaneous (rate is present or timing has a duration), this can be specified to convey the total amount administered over period of time of a single administration (as indicated by schedule).

Identifies the speed with which the medication was or will be introduced into the patient. Typically the rate for an infusion e.g. 200ml in 2 hours. 100 ml per 1 hour or 100 ml/hr. May also be expressed as a rate per unit of time such as 100ml e.g. 500 ml per hour - the duration is then 2 hours. Currently we do not specified, or is specified specify a default of '1' in the quantity. denominator, but this is being discussed. Other examples: 200 mcg/min or 200 mcg/1 minute; 1 liter/8 hours.

If the rate changes over time, and you want to capture this relevant when capturing an administration already performed? Is it in MedicationAdministration, then each change should be captured as a distinct MedicationAdministration, with a specific MedicationAdministration.dosage.rate, and the 80%?. date time when the rate change occurred. Typically, the MedicationAdministration.dosage.rate element is not used to convey an average rate.