Environmental and Health Consequences of Pharmaceutical Disposal Methods: A Scoping Review

Abstract

The global rise in pharmaceutical production and consumption has led to an increase in pharmaceutical waste, posing significant risks to both public health and the environment. Improper disposal methods contribute to environmental degradation, including disruptions to aquatic ecosystems and the spread of antimicrobial resistance. Despite these growing concerns, a comprehensive review of pharmaceutical waste management and disposal practices is still lacking. To address this gap, a scoping review was conducted, analyzing 4269 records from three databases (Medline OVID, Web of Science, and Embase) and grey literature, with 67 studies ultimately included. The initial records were identified through a comprehensive search across the aforementioned databases using a structured strategy based on three core concepts: medication waste, disposal methods, and environmental or human health impacts. This was followed by a two-stage screening process guided by the PCC framework and predefined inclusion criteria. The review aims to assess disposal practices and their impacts, identify research gaps, and guide future research toward effective strategies for managing pharmaceutical waste while protecting ecological balance and public health. The publications timeline shows increasing interest in the topic, particularly with a surge in studies during 2022 and 2023. The findings reveal a significant regulatory gap, especially in the Global South, where limited infrastructure and public awareness lead to reliance on household waste disposal. In contrast, medication take-back programs are more common in the Global North. This disparity underscores the urgent need for policy development. Addressing pharmaceutical waste effectively requires coordinated efforts from the pharmaceutical industry, healthcare providers, regulatory bodies, and local communities. Key strategies should include regulatory action, public education, technological innovation, and addressing issues like drug misuse and overconsumption, particularly of antibiotics, which contribute to antimicrobial resistance. A holistic approach is essential to mitigate both environmental and public health risks.