Medication Histories in Critically Ill Patients Completed by Pharmacy Personnel

Abstract

Background: Although critically ill adults often have extended hospital lengths of stay and are at high risk of having medication-related adverse events, the value of medication histories in these patients remains underreported. Objective: To assess the feasibility of performing medication histories in critically ill adults and to establish the frequency of and characterize identified discrepancies. Methods: This prospective study included patients admitted to 4 intensive care units (ICUs) in a large academic medical center and was conducted in 2 phases. In phase 1, medication histories were conducted over a 5-week period by clinical pharmacists to assess feasibility. In phase 2, medication histories were conducted over a 3-week period by a pharmacy technician. Medication discrepancies, defined as any difference between the documented and pharmacy personnel–identified home medication list, were aggregated in both phases and adjudicated for severity. Results: In phase 1, 127 medication histories were completed (42.3% of admitted patients). Impaired cognition was the most common barrier encountered; however, 76% of patients were able to have a history completed if an attempt was made. In phase 2, a medication history was completed for 176 patients (58.9% of admitted patients). In aggregate, 1155 discrepancies were identified, with 78.2% of patients having a discrepancy. The median number of discrepancies per patient was 3 (interquartile range = 1-5); 11 life-threatening, 101 serious, and 326 significant discrepancies were identified. Conclusion and Relevance: A pharmacy personnel–based medication history program in the ICU is feasible and assists in the discovery of medication discrepancies with the potential for patient harm.

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