Should Physicians Consider the Environmental Effects of Prescribing Antibiotics?

Abstract

Pharmaceuticals are beginning to receive attention as a source of pollution in aquatic environments. Yet the impact of physician prescription patterns on water resources is not often discussed in clinical decision making. Here, we comment on a case in which empiric antibiotic treatment might benefit a patient while simultaneously being detrimental to the aquatic environment. We first highlight the potential harm caused by this prescription from its production to its disposal. We then suggest that Van Rensselaer Potter's original conceptualization of bioethics can be used to balance clinicians' obligations to protect individual, public, and environmental health. CaseDr. Turner, a hospitalist, is called to assess Mr. Johnson, an elderly patient with a history of urinary tract infections (UTIs), who presented to the ER with altered mental status. Urine cultures are pending but previous cultures have grown Escherichia coli (E. coli) with an extended-spectrum beta-lactamase (ESBL) gene. Although Mr. Johnson improves with intravenous fluids, Dr. Turner plans to treat Mr. Johnson with ciprofloxacin, a broadspectrum fluoroquinolone-class antibiotic, to cover the E. coli that he has grown in the past. Dr. Turner recently read that this drug can persist, unaltered, in the hospital's wastewater collection system and in the municipal wastewater water treatment plant (WWTP). While much will be filtered, a quantifiable amount will end up in Mr. Johnson's local watershed. How should Dr. Turner, other physicians, and their institutions weigh the benefits that individual patients derive from pharmaceutical treatment with the contamination risk this treatment poses to freshwater resources used by entire communities and ecosystems?