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When Pollutants Meet Pharmaceuticals: Pollutant–Drug Interactions and Their Hidden Impact on Human Health
Original title: When Pollutants Meet Pharmaceuticals: Pollutant–Drug Interactions and Their Hidden Impact on Human Health
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Everyday pollutants like microplastics, PFAS ("forever chemicals"), and heavy metals may be silently messing with how our medications work — microplastics can bind to antibiotics and help bacteria become drug-resistant, while PFAS exposure has been linked to weaker vaccine responses in kids. This review pulls together existing research (mostly lab and environmental studies, not large human trials yet) to show that pollution and medicine don't exist in separate worlds — they interact in our bodies in ways that could make treatments less effective or resistance more likely. More human-focused research is needed, but the takeaway is that reducing
Environmental pollutants and pharmaceutical wastes increasingly coexist in environmental and biological systems, but their combined health effects remain poorly understood. This narrative review examines interactions between commonly used drugs, including antibiotics, vaccines, nonsteroidal anti-inflammatory drugs (NSAIDs), psychotropic drugs, paracetamol, and phosphodiesterase type 5 (PDE5) inhibitors, and major environmental pollutants such as microplastics, perfluoroalkyl and polyfluoroalkyl substances (PFAS), heavy metals, disinfectant biocides, arsenic, and nitrates. Evidence suggests that these interactions can alter drug bioavailability, therapeutic efficacy, toxicity, and resistance dynamics through adsorption, oxidative stress, immune modulation, and coselection mechanisms. Microplastics can adsorb antibiotics, favoring the emergence and spread of antimicrobial resistance, while also transporting psychotropic drugs and increasing their bioavailability after ingestion. PFAS exposure has been associated with a lower antibody response to tetanus vaccines in children and enhanced horizontal transfer of antibiotic resistance genes. Heavy metals and disinfectant biocides can further coselect for antibiotic resistance through shared mobile genetic elements and cross-resistance mechanisms. Current evidence is dominated by experimental and environmental studies, whereas clinically relevant human data remain limited. A central objective of this manuscript is to encourage research that addresses current knowledge gaps in this field, particularly through environmentally realistic mixing models, longitudinal exposure studies, and mechanistic multiomics approaches to improve toxicological risk assessment and public health strategies.
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