Assessing the Impact of Pharmacist-Led Medication Review on Patient Outcomes in Community Pharmacies

Thesis Abstract

This study investigates the impact of pharmacist-led medication review interventions on patient health outcomes within community pharmacy settings, addressing a critical gap in understanding the efficacy of medication management strategies at the primary care level. Given the rising prevalence of polypharmacy and medication-related adverse events, this research aims to evaluate whether structured medication reviews conducted by pharmacists contribute to improved clinical, behavioral, and economic outcomes among patients with chronic conditions such as hypertension, diabetes, and dyslipidemia. Specifically, the study seeks to determine the extent to which pharmacist-led medication reviews influence medication adherence, reduce drug-drug interactions, minimize adverse drug reactions, and enhance patient satisfaction. Employing a quasi-experimental research design, the study involves a systematic comparison between a control group receiving standard pharmacy care and an intervention group participating in pharmacist-led medication reviews. The study population comprises adult patients aged 40–75 years attending ten community pharmacies within a metropolitan area, with a calculated sample size of 400 participants (200 in each group) based on power analysis to detect meaningful differences in primary outcome measures, with a confidence level of 95% and a power of 80%. Sampling is carried out through stratified random sampling to ensure representation across age, gender, and medication types. Data collection utilizes validated instruments, including the Morisky Medication Adherence Scale (MMAS-8), the Drug Burden Index (DBI), adverse drug reaction reporting forms, and patient satisfaction questionnaires developed specifically for the study. Baseline data are obtained prior to intervention, with follow-up assessments conducted at three and six months post-intervention. Pharmacist-led medication reviews involve comprehensive assessments, medication reconciliation, patient counseling, and tailored recommendations communicated to primary care providers where necessary. Data analysis integrates descriptive statistics (means, frequencies, standard deviations) to profile participant characteristics, while inferential statistics employ multiple regression analysis for continuous outcome variables (e.g., adherence scores, number of adverse reactions) and chi-square tests for categorical variables (e.g., occurrence of adverse events). The study applies the Diffusion of Innovations theory to contextualize adoption of pharmacist interventions, complemented by the Health Belief Model to examine behavioral changes. Thematic analysis of qualitative feedback from patients and pharmacists is conducted to explore perceived benefits and barriers. Expected findings include a statistically significant improvement in medication adherence scores, a reduction in drug-drug interactions, fewer adverse drug reactions, and higher patient satisfaction among those receiving pharmacist-led reviews. These outcomes are anticipated to reinforce the role of pharmacists in optimizing medication management and patient education, thereby contributing to better health outcomes. The study's findings are expected to fill existing gaps by empirically demonstrating the clinical and economic benefits of pharmacist-led medication reviews in community settings, providing evidence to support policy formulation and practice guidelines that integrate pharmacists more comprehensively into primary healthcare teams. The research contributes to knowledge by quantifying the impact of medication review interventions within real-world community pharmacy contexts and elucidating the behavioral mechanisms underlying improved adherence and safety. Concluding, the study recommends the widespread integration of structured medication review protocols into routine community pharmacy practice, enhanced pharmacist training on medication management, and the development of policies incentivizing pharmacist-led interventions. Further research is suggested to explore long-term effects beyond six months, incorporate larger geographical areas, and evaluate cost-effectiveness to inform sustainable healthcare practices.