Assessing the Cost and Quantity of Unused Medications in Continuous Ambulatory Peritoneal Dialysis Patients: A Home Visit Study in Thasala Hospital, Thailand

Abstract

Medication waste among continuous ambulatory peritoneal dialysis (CAPD) patients represents a critical but often overlooked challenge, contributing to unnecessary healthcare costs and potential treatment non-adherence. This study aimed to quantify the cost and volume of unused medications in CAPD patients at Thasala Hospital, Thailand, to inform strategies for reducing waste and optimizing resource allocation. We conducted a cross-sectional survey with 25 CAPD patients through home visits to document unused medications and calculate their associated costs using hospital pharmacy unit prices. A total of 58 unused medications were identified, resulting in a cumulative cost of 24,335 baht (973 baht per patient). The most frequently unused medication was sennoside (7.5 mg), while premixed insulin accounted for the highest financial waste. These findings highlight the substantial economic burden of medication waste and the need for targeted interventions to improve medication management. Enhanced patient education, proactive side effect management, and optimized prescribing practices are essential for reducing waste and improving medication adherence. This study provides actionable insights for improving chronic disease management, reducing healthcare costs, and optimizing patient outcomes in CAPD care.