A prospective intervention study to identify drug-related emergency department visits comparing a standard care group and a pharmaceutical care group.

BACKGROUND AND IMPORTANCE: Adverse drug reactions impose a major burden. Those adverse drug reactions might lead to hospitalization but are often not correctly identified in the emergency department (ED). Clinical pharmacists, although not routinely implemented, can help identify adverse drug reactions. OBJECTIVE: The primary objective was to examine the drug association of ED visits in a pharmaceutical group with a clinical pharmacist integrated in the ED team compared with a standard group without additional support. DESIGN/SETTING/PARTICIPANTS: This prospective intervention study was performed in the ED of a tertiary care university hospital in Leipzig, Germany. Patients who were ≥50 years old were included. From 1 March 2020 to May 31, 2020 patients were enrolled in the standard group. From 1 March 2021 to 31 May 2021, the pharmaceutical group was enrolled. The clinical pharmacist supported the ED team with patient´s detailed medication history and medication analysis. In both groups, patients were evaluated whether their ED visit was drug-related. OUTCOME MEASURES AND ANALYSIS: The number of identified drug-related ED presentations were compared between the two groups. Interventions performed on adverse drug reaction management, causative drugs and patient characteristics were evaluated. MAIN RESULTS: A total of 798 patients were enrolled in the standard group and 827 patients in the pharmaceutical group. Patients whose ED visit was drug-related had a median age of 77 years [(Q25-Q75) 63.5-83.5] and took 7 [(Q25-Q75) 5-8] drugs in standard group. In the pharmaceutical group median age was 78 years [(Q25-Q75) 66-83] and number of drugs taken was 9 [(Q25-Q75) 5.25-11]. 31 (3.9%) drug-related ED visits were identified in the standard group compared to 104 (12.6%) in the pharmaceutical group (OR 3.56; 95% CI 2.35-5.38). An intervention on the patient's pharmacotherapy was performed in 16 drug-related ED visits in standard group compared to 77 in the pharmaceutical group. CONCLUSION: In this study the implementation of a clinical pharmacist was associated with improved identification of drug-related ED visits. Discontinuations of causal medications and dose reductions were significantly higher in the pharmaceutical group compared to the standard care group.

[Adverse drug reactions as cause of nonspecific symptoms in patients in the emergency department]. / Unerwünschte Arzneimittelwirkungen als Ursache unspezifischer Symptome bei Patienten in der zentralen Notaufnahme.

BACKGROUND: In a large proportion of patients admitted to the emergency department (ED), the initial main symptom is nonspecific. One possible reason for this, especially in older patients, may be adverse drug reactions (ADR) due to their frequent polypharmacy. AIM: To illustrate the incidence of ADRs, the affected patient population including risk factors, and drug classes with ADRs leading to nonspecific symptoms. To provide practice recommendations for the management of ADRs in the ED. MATERIAL AND METHODS: Presentation of the pharmacological principles on ADRs, statistics of pharmacovigilance centers as well as original literature including experiences from clinical practice and own projects. RESULTS: In 10% of patients with nonspecific symptoms an ADR is responsible for presentation in the ED. In 60% of cases these ADRs are not correctly identified in the ED setting. A small number of drug classes are responsible for most of these referrals. Databases, risk stratification, clinical pharmacists, or clinical decision support systems are available to improve ADR identification and management. As these options are partly associated with considerable costs or the validation for German EDs is missing, a widespread application does not take place. CONCLUSION: Correct identification of ADRs in patients with nonspecific symptoms in the ED is necessary to initiate adequate treatment. These ADRs are often overlooked because processes and tools for identification and management are not applied in the ED, leading to a lack of awareness. For high-risk patients in the ED, the focus should be on drug history, ideally considering patient-specific risk factors and specific drug classes.