MedicationStatement

MedicationStatement is a FHIR resource that records information about a patient’s medications, whether currently taken or previously taken, as reported by the patient, a caregiver, or a clinician. It covers a broad range of medications, including prescription drugs, over-the-counter medicines, herbal products, and supplements, and does not by itself indicate how the medication was obtained.

A MedicationStatement typically links to a patient (subject) and to the medication itself, which can be represented as a codeable concept or as a reference to a Medication resource. The statement has a status that specifies its current meaning, with codes such as active, completed, entered-in-error, and intended. The timing of use is captured by an effective element that can be a date/time, a period, or a timing expression. Other common attributes include the informationSource (who provided the information), dateAsserted (when the statement was made), and reasons for use (reasonCode or reasonReference). The dosage element records how the medication should be or was taken, including dose, route, timing, and related instructions. Notes may be added for additional context.

Uses and interoperability: MedicationStatement supports medication reconciliation, clinical decision support, and epidemiological reporting, and it commonly participates in workflows alongside MedicationAdministration (actual administration) and MedicationRequest or MedicationOrder (prescribing). Because it can reference standard terminologies and resources, it supports interoperable exchange across health information systems while accommodating patient-reported data.