Pharmaceutical Pollution and Environmental Health: Sources, Ecological Impacts, and the Role of Community Pharmacists in Sustainable Medicine Disposal

Abstract

Pharmaceutical pollution has emerged as an environmental and public health concern due to the increasing detection of active pharmaceutical ingredients and their transformation products in wastewater, surface water, groundwater, and other environmental compartments. These contaminants originate from human and veterinary medicine use, pharmaceutical manufacturing, healthcare facilities, agricultural activities, and the inappropriate disposal of unused or expired medicines. This review examines the principal sources and environmental pathways of pharmaceutical residues, their potential ecological and human health implications, and strategies for reducing pharmaceutical pollution, with particular emphasis on the role of community pharmacists. A narrative review approach was adopted to synthesize relevant scientific literature published from 2011 onward, supplemented by authoritative guidance on pharmaceuticals in drinking water. The literature focuses on pharmaceutical occurrence, environmental fate, ecological effects, wastewater treatment, pharmaceutical waste management, and community pharmacy interventions. Pharmaceutical residues are frequently detected in aquatic environments because conventional wastewater treatment processes do not eliminate all active pharmaceutical ingredients. Environmental exposure may affect aquatic organisms, alter biological processes, and contribute to the selection and dissemination of antimicrobial resistance . However, the magnitude of human health risks associated with exposure to trace concentrations through drinking water remains uncertain and varies according to the substance, exposure pathway, and duration. Medicine take-back programs, public education, improved wastewater treatment, responsible prescribing, and environmentally informed pharmaceutical management represent complementary strategies for reducing contamination. Pharmaceutical pollution requires a coordinated One Health response involving healthcare professionals, environmental authorities, pharmaceutical manufacturers, wastewater operators, policymakers, and the public. Community pharmacists can contribute by educating patients, promoting medicine take-back systems, supporting rational medicine use, and discouraging inappropriate disposal practices.