Impact Of Clinical Pharmacist Interventions On Drug Therapy Optimization And Medication Safety In Hospital Settings: A Systematic Review

Background Medication-related errors are a major source of preventable harm and increased healthcare burden in hospital settings. The role of clinical pharmacists has expanded considerably in recent years, particularly in medication review, medication reconciliation, therapeutic monitoring, and collaboration with multidisciplinary healthcare teams. Evidence from several studies suggests that pharmacist-led interventions can identify prescribing issues early and enhance the safe and effective use of medications. This systematic review evaluates the contribution of clinical pharmacist interventions in reducing medication errors and improving pharmacotherapy outcomes in hospital settings. Objective To assess the effectiveness of clinical pharmacist interventions in optimizing drug therapy management and reducing medication-related errors among hospitalized patients. Methods A systematic search of published literature was performed using electronic databases including PubMed, Scopus, and Web of Science. Only English-language studies evaluating pharmacist-led clinical interventions in hospital settings were included. Twenty studies that met predefined inclusion criteria were selected for analysis. Data regarding study characteristics, types of pharmacist interventions, medication safety outcomes, and clinical benefits were extracted and evaluated using standard systematic review methodology. Results The included studies consistently demonstrated that clinical pharmacist involvement improves medication safety and pharmacotherapy outcomes. Common interventions included medication reconciliation, dose adjustment, identification of drug–drug interactions, therapeutic drug monitoring, and participation in clinical ward rounds. These activities were associated with reductions in prescribing errors, prevention of adverse drug reactions, and improved adherence to clinical guidelines. Several studies also reported that pharmacist-led medication management contributed to reduced healthcare costs by preventing medication-related complications and unnecessary treatments. Conclusion Clinical pharmacist interventions play a significant role in improving medication safety and optimizing drug therapy in hospital settings. Integrating clinical pharmacists into multidisciplinary healthcare teams can help minimize medication errors and enhance patient outcomes. Strengthening clinical pharmacy services represents an important strategy to improve the quality and safety of medication use in healthcare systems.