Xue-Ting Shao , Xin-Dong Ma , Jing-Long Li , Jake W. O’Brien , Kevin Thomas , De-Gao Wang
{"title":"评价右旋芬作为止咳药使用的废水生物标志物:中国的一项纵向研究","authors":"Xue-Ting Shao , Xin-Dong Ma , Jing-Long Li , Jake W. O’Brien , Kevin Thomas , De-Gao Wang","doi":"10.1016/j.watres.2025.124119","DOIUrl":null,"url":null,"abstract":"<div><div>Coughing often signals respiratory health issues. The use of dextromethorphan, available as an over-the-counter opioid antitussive in China, is largely undocumented. This study evaluates the feasibility of dextromethorphan and its metabolite dextrorphan, as wastewater-based epidemiology (WBE) biomarkers for monitoring dextromethorphan use. To determine their suitability, key criteria including urinary excretion, detectability in wastewater, unique human metabolic source, and stability were applied. Both dextromethorphan and its metabolite dextrorphan are excreted via urine (62.5 % as dextrorphan and 0.5 % as dextromethorphan) hence meet the “excreted in urine” criteria. Both biomarkers were also measured in wastewater meeting the “detectable in wastewater” criteria, and dextrorphan’s concentration ratio to dextromethorphan was consistent with its excretion profile suggesting that dextrorphan also meet’s the criteria of “unique source: human metabolism”. In-sample stability was assessed over 72 h and both biomarkers were deemed as stable. Consequently, employing dextrorphan as a WBE biomarker enables the assessment of temporal and spatial usage trends of dextromethorphan, underscoring its practicality. Additionally, a spatio-temporal investigation across 30 Chinese cities revealed an average dextrorphan consumption of 13 mg/d/1000 inh, closely aligning with China’s reported annual production estimate of 12 mg/d/1000 inh. This strong concordance supports the validity of using dextrorphan as a WBE biomarker for estimating dextromethorphan consumption. The consumption of dextromethorphan was higher in northern regions compared to southern regions. Temporally, the consumption of dextromethorphan decreased from 233 mg/d/1000 inh in 2015 to 12.3 mg/d/1000 inh in 2021, but with a notable increase in 2022 (24 mg/d/1000 inh) attributed to the COVID-19 outbreak in China in December 2022. Seasonally, the consumption of dextromethorphan in winter was higher compared to spring. This study confirms the suitability of dextrorphan as a biomarker for assessing dextromethorphan usage, and supports the application of WBE for monitoring population-level use of respiratory OTC medications.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"285 ","pages":"Article 124119"},"PeriodicalIF":11.4000,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Evaluating dextrorphan as a wastewater biomarker for cough suppressant use: A longitudinal study in China\",\"authors\":\"Xue-Ting Shao , Xin-Dong Ma , Jing-Long Li , Jake W. O’Brien , Kevin Thomas , De-Gao Wang\",\"doi\":\"10.1016/j.watres.2025.124119\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Coughing often signals respiratory health issues. The use of dextromethorphan, available as an over-the-counter opioid antitussive in China, is largely undocumented. This study evaluates the feasibility of dextromethorphan and its metabolite dextrorphan, as wastewater-based epidemiology (WBE) biomarkers for monitoring dextromethorphan use. To determine their suitability, key criteria including urinary excretion, detectability in wastewater, unique human metabolic source, and stability were applied. Both dextromethorphan and its metabolite dextrorphan are excreted via urine (62.5 % as dextrorphan and 0.5 % as dextromethorphan) hence meet the “excreted in urine” criteria. Both biomarkers were also measured in wastewater meeting the “detectable in wastewater” criteria, and dextrorphan’s concentration ratio to dextromethorphan was consistent with its excretion profile suggesting that dextrorphan also meet’s the criteria of “unique source: human metabolism”. In-sample stability was assessed over 72 h and both biomarkers were deemed as stable. Consequently, employing dextrorphan as a WBE biomarker enables the assessment of temporal and spatial usage trends of dextromethorphan, underscoring its practicality. Additionally, a spatio-temporal investigation across 30 Chinese cities revealed an average dextrorphan consumption of 13 mg/d/1000 inh, closely aligning with China’s reported annual production estimate of 12 mg/d/1000 inh. This strong concordance supports the validity of using dextrorphan as a WBE biomarker for estimating dextromethorphan consumption. The consumption of dextromethorphan was higher in northern regions compared to southern regions. Temporally, the consumption of dextromethorphan decreased from 233 mg/d/1000 inh in 2015 to 12.3 mg/d/1000 inh in 2021, but with a notable increase in 2022 (24 mg/d/1000 inh) attributed to the COVID-19 outbreak in China in December 2022. Seasonally, the consumption of dextromethorphan in winter was higher compared to spring. This study confirms the suitability of dextrorphan as a biomarker for assessing dextromethorphan usage, and supports the application of WBE for monitoring population-level use of respiratory OTC medications.</div></div>\",\"PeriodicalId\":443,\"journal\":{\"name\":\"Water Research\",\"volume\":\"285 \",\"pages\":\"Article 124119\"},\"PeriodicalIF\":11.4000,\"publicationDate\":\"2025-06-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Water Research\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0043135425010267\",\"RegionNum\":1,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water Research","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0043135425010267","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
Evaluating dextrorphan as a wastewater biomarker for cough suppressant use: A longitudinal study in China
Coughing often signals respiratory health issues. The use of dextromethorphan, available as an over-the-counter opioid antitussive in China, is largely undocumented. This study evaluates the feasibility of dextromethorphan and its metabolite dextrorphan, as wastewater-based epidemiology (WBE) biomarkers for monitoring dextromethorphan use. To determine their suitability, key criteria including urinary excretion, detectability in wastewater, unique human metabolic source, and stability were applied. Both dextromethorphan and its metabolite dextrorphan are excreted via urine (62.5 % as dextrorphan and 0.5 % as dextromethorphan) hence meet the “excreted in urine” criteria. Both biomarkers were also measured in wastewater meeting the “detectable in wastewater” criteria, and dextrorphan’s concentration ratio to dextromethorphan was consistent with its excretion profile suggesting that dextrorphan also meet’s the criteria of “unique source: human metabolism”. In-sample stability was assessed over 72 h and both biomarkers were deemed as stable. Consequently, employing dextrorphan as a WBE biomarker enables the assessment of temporal and spatial usage trends of dextromethorphan, underscoring its practicality. Additionally, a spatio-temporal investigation across 30 Chinese cities revealed an average dextrorphan consumption of 13 mg/d/1000 inh, closely aligning with China’s reported annual production estimate of 12 mg/d/1000 inh. This strong concordance supports the validity of using dextrorphan as a WBE biomarker for estimating dextromethorphan consumption. The consumption of dextromethorphan was higher in northern regions compared to southern regions. Temporally, the consumption of dextromethorphan decreased from 233 mg/d/1000 inh in 2015 to 12.3 mg/d/1000 inh in 2021, but with a notable increase in 2022 (24 mg/d/1000 inh) attributed to the COVID-19 outbreak in China in December 2022. Seasonally, the consumption of dextromethorphan in winter was higher compared to spring. This study confirms the suitability of dextrorphan as a biomarker for assessing dextromethorphan usage, and supports the application of WBE for monitoring population-level use of respiratory OTC medications.
期刊介绍:
Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include:
•Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management;
•Urban hydrology including sewer systems, stormwater management, and green infrastructure;
•Drinking water treatment and distribution;
•Potable and non-potable water reuse;
•Sanitation, public health, and risk assessment;
•Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions;
•Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment;
•Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution;
•Environmental restoration, linked to surface water, groundwater and groundwater remediation;
•Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts;
•Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle;
•Socio-economic, policy, and regulations studies.