Узгодження медикаментів при переході рівня допомоги — closing the information gaps at admission, transfer, and discharge
A "transition of care" is any point where responsibility for a patient's medications changes hands — admission into a facility, transfer between units within a facility, or discharge back to the community. At each of these junctures, medication information must be re-transmitted, re-verified, and re-entered — and every re-transmission is a chance for something to be lost, doubled up, or simply forgotten.
When medication information crosses a transition point without a structured process to carry it forward accurately, errors tend to fall into three recurring categories:
• Omission: a medication the patient was taking (or should continue) is simply left off the new order set — a home blood pressure medication that never gets restarted, or a hospital medication that is dropped from the discharge list • Duplication: the same drug class, or the same active ingredient under a different brand or generic name, gets ordered twice — once under an old name and once under a new one • Wrong dose, route, or frequency: a medication carries over but with a transcription change — a once-daily dose becomes twice-daily, or an IV formulation is not correctly converted to oral equivalent
Each of these can occur silently: there is often no alert, no immediate visible consequence, and no one individually "responsible" for catching it unless a reconciliation step is explicitly built into the workflow at that exact moment.
The risk is not concentrated at one moment — it recurs at every hand-off. A patient who moves from the emergency department to the ICU, then to a step-down unit, then home, passes through at least three to four separate opportunities for medication information to degrade, each requiring its own deliberate reconciliation step.
Medication information is rarely stored in one authoritative place that automatically follows the patient. Instead, it typically exists in fragments:
• The patient's own memory and pill bottles (often incomplete or outdated) • Community pharmacy fill records (may miss samples, OTC products, supplements) • Outpatient provider records (may be from a different health system, not interoperable) • The current inpatient medication administration record (only reflects orders written since admission)
At each transition, whoever is writing the new orders must reconcile against whichever of these sources is available at that moment — and availability itself varies: a night-shift admission may have no accessible outpatient record, while a planned transfer may have a complete chart already in front of the receiving team. The systematic process exists precisely to compensate for this variability, rather than assuming any single source is automatically complete.
It is tempting to think of medication reconciliation as something that happens once — usually associated with discharge. In practice it is a recurring discipline that must be re-applied at every transition, because each transition changes the "current truth" of what the patient should be taking:
• At admission, the reference point is the patient's home regimen • At an intra-facility transfer, the reference point is the most recent verified inpatient order set, checked against the new unit's formulary and care model • At discharge, the reference point is everything that changed during the stay, reconciled into one final, patient-facing list
Treating reconciliation as a single discharge-only task leaves the admission and transfer transitions unprotected — which is exactly where many discrepancies are first introduced, only to be discovered (or missed) much later.
The admission transition is where a patient's outpatient life and inpatient care first meet. The goal is to establish the "best possible medication history" (BPMH) — the most accurate obtainable list of everything the patient was actually taking at home — and then compare it line-by-line against the medications being newly ordered on admission.
A reliable admission reconciliation starts before any comparison can happen — with an accurate home medication list. This is gathered through multiple corroborating sources whenever possible:
• Direct patient or caregiver interview: name, dose, route, frequency, and — critically — whether the patient is actually taking the medication as prescribed • Community pharmacy fill history: confirms what was dispensed, though not necessarily what was taken • Prior discharge summaries or outpatient records: useful when the patient is a poor historian • Pill bottles or a physical medication list brought from home: a direct, tangible cross-check
No single source is treated as sufficient on its own — patient recall can be incomplete, pharmacy records can miss samples or medications filled elsewhere, and old records can be outdated. Triangulating across sources is what produces a "best possible" rather than merely "available" history.
Once the home medication list is established, it is compared item-by-item against the medications being ordered for the inpatient stay. Three outcomes are possible for each home medication:
• Continued: ordered as an inpatient medication, same or clinically equivalent dose/route • Intentionally held or discontinued: a clinical decision is made and documented — e.g., holding an antihypertensive due to admission hypotension, or discontinuing a drug that interacts with a planned procedure • Unintentionally omitted: simply missing from the inpatient orders with no documented clinical rationale — this is the discrepancy the reconciliation process exists to catch
The process is only as protective as the discipline behind it: a home medication list gathered but never actually cross-checked against the order set provides no safety benefit, no matter how thorough the interview was.
Unintentional omission at admission is not a rare edge case — it is one of the most common discrepancy types identified across reconciliation studies, often involving chronic maintenance medications (cardiac, psychiatric, or endocrine) that are easy to overlook when the admitting team is focused on the acute presenting problem.
Moving a patient from one care unit to another within the same facility — most classically from the intensive care unit to a general medical or surgical ward — is often overlooked as a reconciliation moment, because the patient never leaves the building. But the medication orders, formulary options, and care team all change, making this an equally real opportunity for discrepancies.
Within a single hospital stay, a patient may still cross several distinct medication-ordering environments:
• ICU-specific infusions and titrated drips that must be converted to fixed oral or scheduled IV dosing appropriate for a lower level of care • Critical-care formulary items that are not stocked or auto-substituted on general units • Order sets and templates tied to a specific service or unit, which do not automatically transfer • A new care team (different attending, different nursing unit) picking up the patient's chart without having been present for the earlier clinical reasoning
Because the underlying electronic system may treat a unit transfer as routine, orders can lapse or fail to carry forward exactly when the receiving team most needs a complete, accurate picture.
The signature risk at intra-facility transfer is different from admission: rather than home medications being omitted, it is active inpatient orders that risk being unintentionally dropped. This happens when:
• A medication order is unit-specific (tied to an ICU order set or protocol) and does not have an equivalent order automatically generated for the receiving unit • A drug used in the ICU is not on the general ward formulary and requires a substitution decision that gets missed in the handoff • Verbal or informal handoff communication substitutes for a documented, line-by-line review of the active medication list
Reconciling at transfer means the receiving team explicitly reviews and re-affirms (or deliberately changes) every active medication — rather than assuming the prior unit's list will simply persist unless someone happens to notice a gap.
Because the patient technically stays within the same facility, transfer reconciliation is easy to treat as unnecessary — yet the change in formulary, order sets, and responsible care team makes it functionally similar to a hand-off between two different institutions.
Discharge is the transition point most commonly associated with medication reconciliation — and for good reason: it is where every change made during the entire care episode (medications started, stopped, or adjusted) must be consolidated into one final, accurate list and clearly communicated to the people who will actually manage the patient's medications going forward.
By the time a patient is ready for discharge, their medication regimen may bear little resemblance to what they were taking at admission: some home medications were held and need restarting, some inpatient-only medications need to be stopped, some doses were adjusted based on labs or response, and entirely new medications may have been started for a newly diagnosed condition.
Discharge reconciliation means walking through this entire trajectory — home list → inpatient changes → final discharge list — and confirming that every change is intentional, clinically justified, and correctly reflected in the discharge orders. Anything left over from an earlier stage of the stay (a temporarily held medication that never gets restarted, or an inpatient-only drug that accidentally continues on the outpatient prescription) becomes a full discrepancy the moment the patient leaves.
A perfectly reconciled list that never reaches the people who need it provides no protection. Discharge reconciliation is only complete once the final medication list is clearly communicated to:
• The patient and/or caregiver: in plain language, explaining what changed and why — not simply handing over a printed list identical in format to the admission orders • Outpatient providers: primary care physician and any relevant specialists, so that the community-based record reflects the same list the patient is holding • The community pharmacy, where applicable, to prevent an old prescription being refilled alongside a newly changed one
Without this communication step, even a technically accurate reconciliation can fail in practice — the patient goes home, refills an old prescription out of habit, and a discrepancy that was correctly caught inside the hospital re-appears the moment they are back in the community.
Discharge is the last checkpoint before the patient leaves the structured environment of a facility — any discrepancy that survives past this point becomes the patient's own responsibility to catch, which is precisely why clear, plain-language communication matters as much as the technical accuracy of the list itself.
The common thread across admission, transfer, and discharge is that reconciliation only works when it is a structured, repeatable process applied consistently — not an informal double-check performed inconsistently, dependent on which clinician happens to be paying close attention that day. The evidence on medication safety points squarely toward structure over improvisation.
A systematic reconciliation process shares a few defining features regardless of which transition point it is applied to:
• A defined trigger: reconciliation happens automatically at every admission, every transfer, and every discharge — it is not left to individual judgment about whether it seems "necessary" in a given case • A structured comparison step: the current source list (home regimen, prior unit's orders, or full stay history) is explicitly compared line-by-line against the new list, rather than relying on memory or a quick visual scan • Explicit documentation of intentional changes: every medication that is stopped, started, or changed carries a documented reason, distinguishing a deliberate clinical decision from an accidental omission • A designated closing step: someone is accountable for confirming the reconciliation was completed and communicated, rather than assuming it happened
Ad-hoc or informal reconciliation depends entirely on an individual clinician noticing a discrepancy in the moment — during a busy shift, without a structured comparison tool, often relying purely on memory of what the patient was said to be taking. This fails for predictable reasons:
• Cognitive load: clinicians are simultaneously managing acute clinical decisions; a silent, low-salience task like line-by-line list comparison is easy to deprioritize • No fallback: if the one person who might have caught a discrepancy is occupied elsewhere, there is no structural backstop • Inconsistent application: it happens reliably for some patients (e.g., those on obviously high-risk drugs) and inconsistently for others, meaning protection is unevenly distributed
A structured process does not rely on any single individual remembering to be vigilant — it builds vigilance into the workflow itself, applied the same way for every patient at every transition.
Because a single hospital stay typically contains multiple transition points — admission, one or more intra-facility transfers, and discharge — the benefit of a systematic process compounds. A discrepancy that is caught and corrected at admission cannot propagate forward into the transfer or discharge stage; conversely, a gap left unaddressed at any one stage carries forward and compounds the risk at the next.
Applying the same structured process at every single transition point — rather than concentrating effort only at the transition considered most "important" (commonly discharge) — is what closes the full set of opportunities for medication information to be lost, duplicated, or omitted across an entire episode of care.
The single biggest lesson from medication reconciliation research is that consistency of process matters more than the sophistication of any individual reconciliation event: a simple, structured comparison applied every single time outperforms a highly thorough review applied only sometimes.