Pharmacoepidemiology

Background: Pharmacovigilance is a critical component of patient safety, particularly among older adults with chronic diseases who are frequently exposed to polypharmacy. In Kosovo, adverse drug reactions (ADRs) reported by patients remain insufficiently recognized within the healthcare system. Polypharmacy, limited access to pharmaceutical counseling, and self-medication practices may contribute to increased medication-related harm. Capturing ADRs directly from patients provides valuable insight into medication safety challenges and communication gaps in clinical care. Objective: To assess the frequency, characteristics, and reporting behavior of adverse drug reactions among adults aged 60–75 years with chronic diseases in Kosovo, and to identify factors associated with awareness and reporting practices. Methods: A multicenter cross-sectional study was conducted between January and September 2025 in four major cities in Kosovo (Prishtina, Prizren, Peja, and Gjilan). A total of 1024 patients receiving continuous therapy for at least one chronic condition were surveyed using a structured questionnaire covering demographic characteristics, drug exposure, ADR experience, and reporting behavior. Statistical analyses included descriptive statistics, chi-square testing, and multivariable logistic regression to identify predictors of ADR reporting. Results: Overall, 47.3% of participants reported experiencing at least one ADR in the preceding 12 months. Among those, 39.5% reported the event to a healthcare professional, whereas 60.5% did not seek professional advice. The most frequently implicated drug classes were antihypertensives (32.8%), analgesics and non-steroidal anti-inflammatory drugs (27.4%), and antirheumatic agents (14.6%), with mainly gastrointestinal (24.1%) and cardiovascular (18.9%) manifestations. Approximately 19.8% of participants reported discontinuing medication due to adverse effects. Female patients were more likely to report ADRs compared to males (p < 0.01). Lack of prior counseling about potential side effects was independently associated with lower reporting (OR = 2.17; 95% CI: 1.41–3.33). Patients using more than six medications had a higher prevalence of ADRs (61.2%). Conclusion: Adverse drug reactions were frequently reported by older patients, while formal reporting to healthcare professionals remained limited. Strengthening patient education, improving patient–provider communication, and integrating clinical pharmacists into primary care may enhance pharmacovigilance practices and medication safety. Full article