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Diagnosing Down-the-Drain Disposal of Unused Pharmaceuticals at a River Catchment Level: Unrecognized Sources of Environmental Contamination That Require Nontechnological Solutions.

ABSTRACT: Down-the-drain disposal of pharmaceuticals remains an overlooked and unrecognized source of environmental contamination that requires nontechnological "at-source" solutions. Monitoring of 31 pharmaceuticals over 7 days in five wastewater treatment plants (WWTPs) serving five cities in South-West UK revealed down-the-drain codisposal of six pharmaceuticals to three WWTPs (carbamazepine and propranolol in city A, sildenafil in city B, and diltiazem, capecitabine, and sertraline in city D), with a one-off record codisposal of estimated 253 pills = 40 g of carbamazepine and estimated 96 pills = 4 g of propranolol in city A accounting for their 10- and 3-fold respective increases in wastewater daily loads. Direct disposal of pharmaceuticals was found to affect the efficiency of wastewater treatment with much higher pharmaceutical removal (decrease in daily load) during "down-the-drain disposal" days. This is due to lack of conjugated glucuronide metabolites that are cleaved during "consumption-only" days, with the release of a parent pharmaceutical counterbalancing its removal. Higher removal of pharmaceuticals during down-the-drain disposal days reduced pharmaceutical loads reaching receiving environment, albeit with significant levels remaining. The estimated daily loads in receiving water downstream from a discharge point accounted for 13.8 ± 3.4 and 2.1 ± 0.2 g day^-1 of carbamazepine and propranolol, respectively, during consumption-only days and peaked at 20.9 g day^-1 (carbamazepine) and 4.6 g day^-1 (propranolol) during down-the-drain disposal days. Actions are needed to reduce down-the-drain disposal of pharmaceuticals. Our recent work indicated that down-the-drain disposal of pharmaceuticals doubled since the last study in 2005, which may be due to the lack of information and messaging that informs people to dispose of unused medicines at pharmacies. Media campaigns that inform the public of how to safely dispose of medicines are key to improving rates of return and reducing pharmaceutical waste in the environment. The environment is a key motivator for returning unused medicines to a pharmacy and so messaging should highlight environmental risks associated with improper disposal.

SUBMITTER: Kasprzyk-Hordern B

PROVIDER: S-EPMC8735766 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:ObjectiveAlthough community practices towards disposal of expired and unused medications vary globally, the phenomenon is neglected specifically in developing countries. We, therefore, aimed to assess the disposal practices of unused and expired pharmaceuticals among the general public in Quetta city, Pakistan.MethodsA questionnaire-based, cross-sectional survey was conducted among 830 respondents in Quetta city, Pakistan. A pre-validated, structured questionnaire was used for data collection. Data were coded and analyzed by Statistical Package for Social Science (SPSS) version 26. Both descriptive and inferential statistics were sued and p<0.05 was taken as significant.ResultsAlmost 87% of the respondents had unused medicines at their homes and reusing the medications was the purpose of medicine storage (50%). Medicines were mostly kept in refrigerators (36.0%) followed by bedrooms (28.8%). Fifty percent of the respondents never checked the expiry date before using the medications. The procedure to dispose of nearly expired or expired medicines was unknown to 88% of the respondents and for those reasons, medicines were disposed either in household trash or flushed in the toilet or sink. Interestingly, medicines were kept at home even after being expired by 27% of the respondents. Income was associated with reason of storing medicines (p = 0.004; φc = 0.402) while educational status had significant associations with storage of medications (p = 0.002; φc = 0.399), reading about storage instructions (p = 0.008; φc = 0.452) and checking expiry date before purchasing and using the medicines (p = 0.007; φc = 0.114 and p = 0.001; φc = 0.100) respectively.ConclusionImproper storage and disposal of unused and expired medications is a common practice among study respondents and raised serious concerns. Findings of the current study call upon immediate development and implementation of the strategies to promote awareness and strengthen the pharmaceutical waste management program at the societal level.

Project description:Background:Medicines have become part of our day-to-day life. Due to different reasons, patients may not use all the medications dispensed to them. The storage of drugs at home promotes self-medication, which results in variety of adverse consequences. Global growth in health-seeking awareness and behavior among people has resulted in increment of medicine consumption over years. However, Ethiopians have little awareness about proper disposal of unused and expired pharmaceuticals. Besides, large quantities remain unused or expired since not all medications given to the consumers are consumed. Hence, this study could serve as an indicator for the country policy makers concerning pharmaceutical waste management. Objective:To assess knowledge, attitude, and disposal practice of unused and expired pharmaceuticals in the community of Adigrat city, Tigray, Ethiopia, 2019. Methodology. A cross-sectional study was conducted among 359 respondents from the residents of Adigrat city. Semistructured questionnaires, which focused on knowledge, attitudes, and disposal practices for unused and expired medications, were used to collect data from respondents. Epi-data 3.0 suite and the statistical package for social sciences (SPSS) version 20 were used in data entry and analysis. Results:All of the 359 returned questionnaires were valid for data entry and analysis. Of the 359 respondents, 57.7% were men and the majority (93%) were Orthodox Christians. Almost half of the respondents (50.14%) have good knowledge concerning the disposal of unused and expired pharmaceuticals. Most (82.2%) of the respondents have a positive attitude towards the disposal of unused and expired pharmaceuticals. Around fifty-two (52.4) of the respondents had unused medicines stored at home, with analgesics being the most common (41.5%). Around three-quarters (75.2%) and 63% of the respondents discarded unused and expired medicines in the garbage bins, respectively. Conclusion:Although the majority of the respondents had a positive attitude towards the disposal of unused and expired medications, almost half of the sample population were unaware of proper disposal practices. Furthermore, less were inclined to practice proper disposal of unused and expired medications in the city. Therefore, we recommend further studies that focus on how the disposal attitude of the population can influence their knowledge and practice of the disposal of unused and expired medications.

Project description:Introduction: Opioid misuse and overprescription have contributed to a national public health crisis in the United States. Postoperatively, patients are often left with unused opioids, which pose a risk for diversion if not appropriately disposed of. Patients are infrequently provided instructions on safe disposal methods of surplus opioids. Purpose: We sought to determine the current rates of disposal of unused opioids and the reported disposal mechanisms for unused opioids that were prescribed for acute postoperative pain control. Methods: A systematic review was performed of the PubMed, Cochrane, and Embase databases for relevant articles from their earliest entries through October 2, 2019. We used the search terms "opioid" or "narcotic" and "disposal" and "surgery." Studies were considered for inclusion if they reported the rate of disposal of unused opioids following surgery. A screening strategy was used to identify relevant articles using Covidence. For studies meeting inclusion criteria, relevant information was extracted. Results: Sixteen studies met inclusion criteria. We found that surplus opioid disposal rates varied widely, from 4.9% to 87.0%. Among studies with no intervention (opioid disposal education or drug disposal kit/bag), rates of opioid disposal ranged from 4.9% to 46.5%. While 7 studies used opioid disposal education as an intervention, only 3 showed a significant increase in surplus opioid disposal compared with standard care. All 3 studies that used an opioid disposal kit or bag as an intervention demonstrated significant increases in opioid disposal. Conclusions: Baseline rates of surplus opioid disposal are relatively low in the postoperative setting. Our findings suggest that opioid disposal kits significantly increase rates of surplus opioid disposal postoperatively. Further research, including a large-scale cost-benefit analysis, will be necessary prior to recommending widespread implementation of drug disposal kits or bags.

Project description:BackgroundThe improper disposal of unused medicines is a worldwide concern because of its impact on the environment, economy, and health. This study aims to describe the disposal practice of unused medicine and identify factors associated with unused medicines in Malaysia.MethodsThis was a cross-sectional, face to face interview-based survey using a structured questionnaire. We used a convenience sampling method to recruit participants from Kuala Lumpur and Selangor in Malaysia.ResultsWe interviewed 1184 participants, and the response rate was 96%. Out of the total respondents, 995 (84%) reported having unused medicines. About a quarter of respondents kept unused medicines in the cabinet, and another quarter disposed of them into the trash or toilet. Only half of the respondent who used medicines for chronic illnesses had unused medicines compared to about 90% of respondents who used medicines for acute illnesses. The main reason for having unused medicines among those who used medicines for chronic illness was non-adherence (69%, p < 0.05). Only 27% of these respondents returned unused medicines under the "Medicine Return Programme (MRP)". The other group who used medicines for acute illnesses had unused medicines because their health conditions improved. Thus, most of the unused medicines will eventually end up in household waste. A multivariate logistic regression analysis identified respondents who used medicines for acute illnesses as the strongest predictor of having unused medicines (Odds Ratio (OR) = 29.8; p < 0.001), followed by those who pay for their medicines (OR = 6.0; p < 0.001) and those who were willing to participate the Medicine Return Programme (OR = 2.5; p = 0.009).ConclusionThe prevalence of unused medicines and their improper disposal were high in Malaysia. Unused medicines are associated with people who use medicines for acute illnesses, pay for their medication, and are willing to participate in an MRP. Rationale prescription and optimal dispensing practice, together with a broader MRP facilities coverage, could reduce unused medicine possession.

Project description:ImportanceAlthough opioids are an important component of pain management for children recovering from surgery, postoperative opioid prescribing has contributed to the current opioid crisis in the United States because these medications are often prescribed in excess and are rarely properly disposed. One potential strategy to combat opioid misuse is to remove excess postoperative opioids from circulation by providing patients with drug disposal products that enable safe disposal of opioids in the home garbage.ObjectiveTo determine whether the provision of a drug disposal bag increases proper opioid disposal among the families of pediatric patients undergoing ambulatory surgery.Design, setting, and participantsThis randomized clinical trial enrolled 202 parents or guardians of children 1 to 17 years of age who underwent otolaryngologic or urologic surgery at the outpatient surgery centers of a tertiary children's hospital in Columbus, Ohio, from June to December 2018 and who received an opioid prescription prior to discharge.InterventionsFamilies randomized to intervention were provided a drug disposal bag containing activated charcoal and instructions for use plus standard postoperative discharge instructions on opioid use, storage, and disposal. Families in standard care arm received standard postoperative discharge instructions only. All participants completed a baseline survey and a follow-up survey 2 to 4 weeks postoperatively.Main outcomes and measuresPrimary outcome was proper opioid disposal, defined as disposal using a drug disposal bag or a disposal method recommended by the US Food and Drug Administration.ResultsOf 202 parents or guardians enrolled, 181 completed follow-up (92 in intervention arm and 89 in standard care arm). Most patients in both groups were white (75 [73.5%] vs 79 [80.6%]) and male (63 [61.2%] vs 54 [54.6%]), and the median (interquartile range) age was 6 (5-9) years in the intervention arm and 7 (6-10) years in the standard care arm. For intention-to-treat analyses, 92 families receiving a disposal bag and 89 families not receiving a disposal bag were included. Among them, 66 families (71.7%) randomized to receive a disposal bag reported properly disposing of their child's opioids, whereas 50 parents (56.2%) who did not receive a disposal bag reported proper opioid disposal (difference in proportions, 15.5%; 95% CI, 1.7%-29.3%; P = .03). Among only those families who filled an opioid prescription and had leftover opioids after resolution of their child's pain, 66 of 77 parents or guardians (85.7%) who had received a disposal bag and 50 of 77 parents or guardians (64.9%) who had received standard care reported properly disposing of their child's opioids (difference in proportions, 20.8%; 95% CI, 7.6%-34.0%).Conclusions and relevanceResults of this study indicated that providing drug disposal bags to families of children receiving postoperative opioids increased the likelihood of excess opioid disposal. Greater availability of disposal products may complement ongoing prescribing reduction efforts aimed at decreasing opioid misuse.Trial registrationClinicalTrials.gov identifier: NCT03575377.

Dataset Information

Diagnosing Down-the-Drain Disposal of Unused Pharmaceuticals at a River Catchment Level: Unrecognized Sources of Environmental Contamination That Require Nontechnological Solutions.

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