Pharmacist-acquired medication histories in a university hospital emergency department.

Purpose: A study was conducted to identify discrepancies between medication histories taken by emergency department (ED) providers (physicians, nurses, and medical students) and medication histories taken by clinical pharmacists.

Methods: During a three-month period, a clinical pharmacist was assigned to the ED in a 475-bed, tertiary care teaching facility that serves as a level I trauma center. On the arrival of a patient, ED providers completed a standard assessment that included the patient's medication history. Patients to be admitted through the ED were interviewed by the clinical pharmacist. In addition to a medication history, the pharmacist collected the patient's height, weight, immunization history, and allergy information. The medication history obtained by the ED provider was compared with the history obtained by the clinical pharmacist, and discrepancies were documented.

Results: The clinical pharmacists in the ED performed 286 medication histories; 34 were excluded. The remaining 252 histories taken were used in the study. The pharmacists identified 1096 home medications versus 817 home medications documented by ED providers. Of the 817 home medications documented by the ED, the regimens of 637 (78%) were incomplete and were supplemented with dosing information by the pharmacists. Pharmacists reported 375 medication allergies versus 350 reported by ED providers. Immunization histories were obtained in 252 of the 252 (100%) pharmacist-acquired medication histories versus 45 of the 252 (18%) acquired by ED personnel.

Conclusion: Pharmacist-acquired medication histories in the ED were more complete than those acquired by other health professionals.