Why an Admission Medication Error Becomes a Standing Order

In a study of 199 skilled nursing facility admissions, at least one medication discrepancy was identified in 71% of them. Across the 2,319 medications reviewed, one in five carried a discrepancy. More than half of those discrepancies traced to a single cause: the hospital discharge summary and the patient care referral form did not agree with each other. Cardiovascular agents, opioid analgesics, neuropsychiatric agents, hypoglycemics, antibiotics, and anticoagulants accounted for over half of all discrepant medications.

A medication error caught during a medication pass affects one administration. A medication error embedded at admission behaves differently. Once the admission list is transcribed onto the Medication Administration Record (MAR), it stops being a discrepancy and becomes a standing order. Every scheduled administration that follows executes it faithfully, shift after shift, until someone catches it. The nurse at the cart is not making an error. She is correctly carrying out an instruction that was wrong before she received it. Admission reconciliation is the point at which an error either stops or gets systematized.

The Gap Between Discharge and Admission

In the best case, discharge is a clean handoff. Before the patient leaves, the hospital reconciles medications, sends a structured summary, and briefs the patient on what comes next.

In practice, that handoff frequently breaks down, and the Skilled Nursing Facility (SNF) is left to reconstruct the resident’s medication history inside the first 24 hours. The causes compound:

• Late or incomplete summaries. Discharge summaries are often dictated and routinely arrive late or missing essential information.
• Uncross-checked medication changes. Medications are added, discontinued, or adjusted during a hospital stay. Without formal reconciliation, any of these changes can be missed.
• Pending results. According to AHRQ’s Patient Safety Network, nearly 40% of patients are discharged with test results still pending, and a comparable proportion leave with a diagnostic workup to be completed as an outpatient. Intake decisions get made on a partial clinical picture.

The Assumptions That Undermine Reconciliation

Reconciliation can also fail on the receiving end, independent of anything the hospital did or did not send. Three assumptions do most of the damage.

The first is that the prior setting reconciled accurately. Often it did not. A systematic review of 22 studies covering 3,755 patients found medication history errors at hospital admission in up to 67% of cases, with omission of a pre-admission drug the most common failure. A list arriving from another facility may carry errors introduced before that facility received it.

The second is that the Electronic Health Record (EHR) is authoritative. Different settings operate under different priorities. An “at home” list may not reflect current use, discontinued medications resurface on active lists, and systems across care settings frequently do not communicate with one another, including within a single health system.

The third is that the resident or family knows what is on the list. For residents with complex regimens, which is to say the residents at highest risk, this is the least reliable source of all.

None of these are failures of attention. They are failures of structure, and no amount of individual diligence corrects a structural gap at the moment it matters most. Our Clarest Consultant Pharmacists have written elsewhere about the assumptions that undermine reconciliation, drawing on experience across thousands of transitions.

What the Admission Review Has to Catch

Pharmacist-led reconciliation has been shown to reduce discrepancies, adverse drug events, and medication costs in hospital and community settings. What research published in the Joint Commission Journal on Quality and Patient Safety also notes is that evidence-based interventions specific to the SNF setting remain limited. The intervention is proven. Its application at SNF admission is where the gap sits.

Reviewing a list is not the same as reconciling it. Across thousands of transitions, four discrepancy patterns account for a disproportionate share of what our pharmacists find at admission, and each one behaves the same way once it reaches the MAR.

Dose and frequency drift from the pre-admission regimen. A medication restarted at the wrong strength or interval will run at that strength indefinitely. A blood pressure medication that moves from once daily to twice daily does not announce itself. It produces hypotension weeks later.

Formulation substitutions that never get reversed. Hospitals substitute immediate-release for extended-release for availability or cost reasons, and the substitution is not always flagged at discharge. If the extended-release form is not reinstated when appropriate, absorption and symptom control change without anyone ordering that change.

Missing stop dates on time-limited therapy. Antibiotics and anticoagulants are prescribed with an intended duration that discharge instructions do not always document. Without an end date, the pass keeps running the order.

Psychotropics started for non-psychiatric reasons. Antipsychotics, benzodiazepines, and sedative-hypnotics are frequently initiated during a hospital stay to manage agitation or sleep disruption, then carried forward after the precipitating issue resolves. In older adults, an indication that no longer exists becomes a standing risk.

Each of these is invisible to a transcription process and catchable by a reconciliation process. The difference is whether someone is comparing the admission order against a verified pre-admission history, current labs, and a documented indication, rather than against the discharge paperwork alone.

What a Pharmacy Partner Changes

Closing the gap is a matter of shortening the interval between when the list becomes an order and when a pharmacist reviews it. The work our pharmacists do with facilities follows a consistent shape:

• The facility uploads the finalized admission list to the EHR, which gives the consultant pharmacist visibility into the regimen as it currently stands.
• The pharmacist reviews new admission orders on a set schedule, comparing the admitting order against a verified pre-admission history, current labs, and documented indications rather than against the discharge paperwork alone.
• For readmissions, the review includes a comparison against prior history, since the most useful reference point for a returning resident is what they were on before the hospital saw them.

What distinguishes a checkpoint from a checkbox is that the review happens at all, on a schedule, independent of how busy the admitting shift was. A pharmacist working through new admission orders catches the patterns above precisely because that pharmacist is not the person who took the admission. The shorter the interval between the order and the review, the fewer administrations run against an error before it is found.

Safe transitions require a systematic approach not only at discharge, but at admission. Pharmacist-led reconciliation establishes an accurate regimen from the start. A well-run medication pass then upholds that accuracy across every scheduled administration. The first protects what the second executes.

To learn more about how Clarest supports admission reconciliation, contact us today.