Pharmacist-Conducted Patient Medication Assessment

Patient medication assessment is the first step of the pharmaceutical care process, in which the pharmacist builds a complete and accurate picture of a patient's medications, conditions, and experience so that drug therapy problems can be identified. It combines information gathering, medication reconciliation, and clinical evaluation against the patient's goals.

Definition

A pharmacist-conducted patient medication assessment is the systematic collection and clinical evaluation of all relevant information about a patient's medications, medical conditions, goals, and medication experience, including reconciliation of medication records, in order to determine whether the patient's drug-related needs are being met.

Scope

This topic covers what a structured medication assessment involves: collecting the medication experience and history, reconciling medication lists across sources, and evaluating each therapy for appropriateness, effectiveness, safety, and adherence. It also covers comprehensive medication review as a formalised assessment. The entry is descriptive and does not provide individualised clinical instructions.

Core questions

• What information must a complete medication assessment capture?
• How does medication reconciliation fit within assessment?
• What does a comprehensive medication review add beyond a simple list check?
• How does assessment connect to identifying drug therapy problems?

Key concepts

• Medication experience and history
• Medication reconciliation
• Comprehensive medication review
• Assessment of indication, effectiveness, safety, adherence
• Best possible medication history
• Transitions of care

Key theories

Assessment as the entry point of the care process

In the pharmaceutical care model, assessment is the structured first phase in which the pharmacist elicits the medication experience and evaluates indication, effectiveness, safety, and adherence before any problem can be named or plan made.

Medication review as a defined, gradable activity

The Pharmaceutical Care Network Europe consensus defines medication review and distinguishes levels of review by the information available, giving assessment an agreed terminology for research and practice.

Mechanisms

Assessment proceeds by assembling the best possible medication history from the patient and from available records, reconciling discrepancies between sources, and then evaluating each medication against the patient's conditions and goals. The pharmacist also elicits the patient's medication experience — beliefs, concerns, and behaviour — because these shape adherence and the meaning of the data. The structured output of assessment is the information needed to identify drug therapy problems and to construct a care plan.

Clinical relevance

A thorough assessment is what allows medication issues to be detected before they cause harm, particularly at transitions of care where information is easily lost. This entry describes the activity and its components; it is a reference orientation and does not constitute individualised medical advice.

Epidemiology

Medication discrepancies are common at hospital admission and discharge, and reconciliation studies show that structured assessment detects and corrects errors that would otherwise persist (Vira et al., 2006; Kwan et al., 2013). Ambulatory adverse drug event data further indicate that many medication problems are detectable through systematic review (Gandhi et al., 2003).

History

Structured medication assessment grew out of the pharmaceutical care movement of the 1990s, which made information gathering and clinical evaluation a defined first step rather than an informal preamble to dispensing. Subsequent patient-safety work on medication reconciliation at transitions of care, and European consensus definitions of medication review, formalised the terminology and graded the depth of assessment.

Debates

How standardised should medication review terminology be?

Reviews vary from simple list checks to clinical, prescription, and adherence reviews; consensus efforts such as the PCNE definition aim to standardise terms, but practice and research continue to use the labels inconsistently, hampering comparison.

Key figures

• Linda M. Strand
• Robert J. Cipolle
• Kurt E. Hersberger
• J. W. Foppe van Mil

Seminal works

• cipolle-strand-morley-2012
• griese-mammen-2018

Frequently asked questions

What is the difference between medication reconciliation and a medication review?

Reconciliation focuses on producing an accurate, agreed medication list by comparing sources, while a medication review adds clinical evaluation of whether each medication is indicated, effective, safe, and being taken as intended.

Why is medication assessment especially important at transitions of care?

Information about a patient's medications is easily lost or duplicated when care moves between settings, so structured assessment at admission and discharge helps detect and correct discrepancies.