reconciling-medications

name	reconciling-medications
description	Compares medication lists across care settings to identify discrepancies, duplications, and omissions. Use when performing medication reconciliation, identifying med discrepancies, or verifying discharge prescriptions.
tags	["reconciliation","pharmacy","patient-safety"]
metadata	{"author":"casemark","practice_areas":["Clinical Pharmacy","Pharmacy"],"document_types":["Reconciliation Report"],"skill_modes":["Reconciliation","Verification"]}

Reconciling Medications

Performs structured medication reconciliation across care transitions by comparing medication lists from multiple settings, flagging discrepancies, and producing an actionable reconciliation report suitable for pharmacist or provider review.

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Why This Skill Exists

Medication errors injure over 1.3 million Americans annually and kill approximately 7,000. The single highest-risk moment is a care transition — admission, transfer, or discharge — where medication lists from different sources must be merged into one accurate, current regimen.

The Joint Commission recognizes this risk as National Patient Safety Goal NPSG.03.06.01, requiring organizations to "maintain and communicate an accurate patient medication list." Despite this mandate, studies consistently show that 30–70 % of patients have at least one unintended medication discrepancy at admission or discharge.

This skill exists to systematically surface those discrepancies before they reach the patient. It enforces the Best Possible Medication History (BPMH) methodology: a structured interview and multi-source verification process that goes beyond simply copying a list from the chart.

When to invoke this skill:

• Admission med-rec (ED → inpatient)
• Transfer med-rec (ICU → floor, facility → facility)
• Discharge med-rec (inpatient → home/SNF/rehab)
• Post-discharge follow-up or clinic visit reconciliation
• Retrospective chart review for quality or litigation support

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Checkpoint A: Pre-Draft Intake (Mandatory)

Before generating any output, confirm or obtain every item below. If a source is unavailable, document it as [NOT PROVIDED] — never silently skip it.

A1. Transition Context

Field	Required	Notes
Transition type	Yes	Admission / Transfer / Discharge / Clinic follow-up
Sending facility & unit	Yes	Include care level (ICU, med-surg, SNF, home)
Receiving facility & unit	Yes	Same
Date/time of transition	Yes	Use ISO-8601 when possible
Responsible provider (sending)	Yes	Name, role, contact
Responsible provider (receiving)	Yes	Name, role, contact

A2. Medication Lists Available

Collect all lists that exist. Each list becomes a column in the reconciliation matrix. Common sources:

1. Home medication list — patient-reported or pharmacy-verified
2. Admission orders — first orders entered on arrival
3. Inpatient medication administration record (MAR) — what was actually given
4. Discharge prescription list — what the patient leaves with
5. External pharmacy records — retail/mail-order fill history
6. Prior facility transfer summary — if transferring between facilities

BPMH note: The home list should ideally be built from ≥ 2 sources (patient interview + pharmacy records or pill bottles). A single-source list must be flagged as [UNVERIFIED — SINGLE SOURCE].

A3. Patient Context

Field	Required	Notes
Age / DOB	Yes	Pediatric and geriatric patients carry extra risk
Weight (kg)	When available	Required for weight-based dosing checks
Allergies & intolerances	Yes	Drug, food, environmental; include reaction type
Renal function (SCr / CrCl / eGFR)	When available	Flag renally-dosed meds if absent
Hepatic function (Child-Pugh / MELD)	When available	Flag hepatically-dosed meds if absent
Pregnancy / lactation status	When applicable	Category X drugs must be flagged immediately
Primary diagnoses	Yes	Needed to validate indication for each med
Code status / goals of care	When available	Affects appropriateness of certain therapies

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Workflow

Step 1 — Normalize Each List

For every medication on every source list, extract and standardize:

Column	Format	Example
Generic name	lowercase, INN preferred	metoprolol succinate
Brand name	Title Case, if relevant	Toprol-XL
Dose	numeric + unit	50 mg
Route	abbreviation (PO, IV, SQ, etc.)	PO
Frequency	standard sig codes	daily
Indication	short phrase	HTN
PRN qualifier	if applicable	PRN headache
Prescriber	name or role	Dr. Chen (cardiology)

Include OTC medications, herbals, vitamins, and supplements. These are the most commonly omitted categories and frequently cause interactions (e.g., St. John's Wort + SSRIs, fish oil + anticoagulants).

Step 2 — Build the Reconciliation Matrix

Create a row per unique medication (match by generic name + route). Columns represent each source list. Mark the status in each cell:

Status Code	Meaning
CONTINUED	Same drug, dose, route, frequency — no change
DOSE CHANGED	Same drug, different dose or frequency
NEW	Not present on prior list
DISCONTINUED	Present on prior list, absent on current
OMITTED — UNINTENTIONAL?	Absent without documented rationale — flag for review
THERAPEUTIC DUPLICATE	Different drug, same pharmacologic class, overlapping indication
DUPLICATE	Same drug appears more than once
HELD	Temporarily suspended (e.g., NPO, peri-operative)
SUBSTITUTED	Formulary or insurance swap to a different agent in the same class

Step 3 — Flag Discrepancies

Every row that is not CONTINUED is a discrepancy requiring attention. Prioritize by severity:

Critical (resolve before patient leaves the current setting):

• Omission of a high-alert medication (see ISMP list below)
• Duplicate anticoagulant, insulin, or opioid
• Drug-drug interaction rated as "major" or "contraindicated"
• Allergy mismatch — medication on list conflicts with documented allergy
• Category X drug in pregnancy

High (resolve within the same shift):

• Unintentional dose change on a narrow therapeutic index drug
• Renal/hepatic dose adjustment needed but not made
• Omission of chronic disease maintenance medication (e.g., anticonvulsant, immunosuppressant)

Moderate (resolve before next transition):

• Therapeutic duplicate with no documented rationale
• OTC/supplement omission with interaction potential
• Frequency discrepancy (e.g., BID vs TID)

Low (document for follow-up):

• Brand/generic discrepancy with no clinical impact
• Cosmetic sig differences (e.g., "daily" vs "once daily")

Step 4 — High-Alert Medication Cross-Check

Per the ISMP List of High-Alert Medications in Acute Care Settings, give extra scrutiny to:

Class	Examples	Key Checks
Anticoagulants	warfarin, heparin, enoxaparin, DOACs	Duplication, bridging protocols, INR/anti-Xa monitoring
Insulins	all formulations	Sliding scale vs scheduled, basal/bolus pairing, hypoglycemia risk
Opioids	morphine, hydromorphone, fentanyl, oxycodone	MME calculation, duplicate opioids, naloxone co-prescribing
Antiarrhythmics	amiodarone, sotalol, flecainide	QTc interactions, thyroid/pulmonary monitoring
Chemotherapy	all agents	Protocol verification, hold criteria, supportive meds
Concentrated electrolytes	KCl > 40 mEq, NaCl 23.4 %, MgSO4	Concentration, rate, cardiac monitoring
Neuromuscular blockers	succinylcholine, rocuronium	Context-appropriate only (OR/ICU), never on floor orders
Sedatives (IV)	propofol, midazolam, ketamine	Setting-appropriate, monitoring orders in place

If any high-alert medication has a discrepancy of any severity, escalate the finding to the top of the report regardless of the general severity tier.

Step 5 — Allergy & Interaction Screen

• Cross-reference every medication on the reconciled list against the patient's allergy and intolerance record.
• Flag cross-sensitivities (e.g., penicillin allergy → cephalosporin caution).
• Run a drug-drug interaction check across the final reconciled list. Report interactions at the "major" or "contraindicated" level. Note "moderate" interactions only if clinically relevant given patient context.

Step 6 — Renal & Hepatic Dose Review

If renal or hepatic function data is available:

• Flag every renally-cleared medication where the dose has not been adjusted for the patient's CrCl/eGFR.
• Flag hepatically-metabolized medications where Child-Pugh or MELD suggests dose reduction.
• If lab values are [NOT PROVIDED], append a blanket caveat: ⚠ Renal/hepatic function not available — dose appropriateness not verified.

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Output Structure

The final reconciliation report must contain these sections in order. See references/RECONCILIATION-TEMPLATE.md for formatted table templates.

1. Header — Patient identifier, transition type, date, facilities, providers
2. Summary Dashboard — Total meds reconciled, counts by status code, critical/high/moderate/low discrepancy counts
3. Reconciliation Matrix — Full table, sorted by discrepancy severity (critical first), then alphabetically
4. High-Alert Medication Detail — Dedicated section for any high-alert med with a non-CONTINUED status
5. Allergy & Interaction Findings — Allergy mismatches and major DDIs
6. Renal/Hepatic Flags — Dose adjustment concerns
7. Unresolved Items — Anything marked [VERIFY] or [NOT PROVIDED]
8. Pharmacist Attestation Block — Name, credentials, date, signature line

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Checkpoint B: Post-Draft Alignment (Mandatory)

Before finalizing, verify every item:

• Every medication from every source list appears in the matrix (no silent drops)
• Every non-CONTINUED row has a severity rating
• High-alert medications are called out in their dedicated section
• Allergy list has been cross-checked against the final reconciled list
• OTC meds, herbals, and supplements are included
• Renal/hepatic caveat is present if labs were unavailable
• All [VERIFY] and [NOT PROVIDED] tags are collected in Unresolved Items
• Transition context (sending/receiving facility, providers) is complete
• Output follows the template structure in references/RECONCILIATION-TEMPLATE.md
• No medication was assumed to be intentionally discontinued without documentation

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Quality Audit

Criterion	Pass	Fail
All source lists accounted for	Every provided list appears as a column	Any list silently omitted
BPMH sourcing documented	≥ 2 sources for home med list, or flagged as single-source	Single source used without flag
High-alert meds highlighted	Dedicated section present with zero omissions	Any high-alert med buried in general matrix only
Allergy cross-check completed	Explicit statement of check; findings listed or "none"	No mention of allergy screen
Severity tiers assigned	Every discrepancy has Critical / High / Moderate / Low	Any discrepancy without a tier
Renal/hepatic addressed	Dose flags present or caveat for missing labs	No mention of organ function
OTC/supplement inclusion	Explicitly listed or noted as [NOT PROVIDED]	Category entirely absent
[VERIFY] tags collected	All uncertain items in Unresolved section	Uncertain items unmarked or scattered
Attestation block present	Pharmacist name, credentials, date, signature line	Missing or incomplete

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Reference Files

• references/RECONCILIATION-TEMPLATE.md — Output table templates for the reconciliation matrix, summary dashboard, high-alert detail section, and attestation block.

External References (do not fetch — for human context only)

• Joint Commission NPSG.03.06.01 — Medication Reconciliation
• ISMP List of High-Alert Medications in Acute Care Settings (updated annually)
• WHO High 5s Project — Standard Operating Protocol for Medication Reconciliation
• ASHP Guidelines on Pharmacy-Directed Medication Reconciliation

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Guidelines

• Never assume a medication was intentionally discontinued without explicit documentation from the prescribing provider. Unexplained absences from a medication list must be flagged as [OMITTED — UNINTENTIONAL?] until resolved.
• The Best Possible Medication History (BPMH) must be sourced from at least two independent sources (e.g., patient interview plus pharmacy fill records). A single-source medication history must always be flagged as [UNVERIFIED — SINGLE SOURCE].
• High-alert medications per the ISMP list require individual line-by-line reconciliation at every care transition — they must never be batch-processed or assumed continued without verification.
• All OTC medications, herbal supplements, and vitamins must be explicitly included in the reconciliation matrix. Their omission is the most common source of undetected drug-drug interactions at care transitions.
• When renal or hepatic function data is unavailable, append a blanket caveat to the reconciliation report rather than assuming doses are appropriate. Never silently pass a renally-cleared medication without organ function verification.
• Every discrepancy must be assigned a severity tier (Critical, High, Moderate, Low) before the reconciliation report is finalized. Untiered discrepancies are considered incomplete reconciliation.
• Reconciliation reports are draft documents until attested by a licensed pharmacist or credentialed provider. AI-generated output must never be transmitted to a receiving facility without human review and signature.
• For cross-facility transfers, confirm formulary compatibility between sending and receiving institutions before finalizing therapeutic substitutions to prevent gaps in medication availability at the receiving site.