Skip to main content

Main menu

  • HOME
  • ONLINE FIRST
  • CURRENT ISSUE
  • ALL ISSUES
  • AUTHORS & REVIEWERS
  • SUBSCRIBE
  • BJGP LIFE
  • MORE
    • About BJGP
    • Conference
    • Advertising
    • eLetters
    • Alerts
    • Video
    • Audio
    • Librarian information
    • Resilience
    • COVID-19 Clinical Solutions
  • RCGP
    • BJGP for RCGP members
    • BJGP Open
    • RCGP eLearning
    • InnovAIT Journal
    • Jobs and careers

User menu

  • Subscriptions
  • Alerts
  • Log in

Search

  • Advanced search
British Journal of General Practice
Intended for Healthcare Professionals
  • RCGP
    • BJGP for RCGP members
    • BJGP Open
    • RCGP eLearning
    • InnovAIT Journal
    • Jobs and careers
  • Subscriptions
  • Alerts
  • Log in
  • Follow bjgp on Twitter
  • Visit bjgp on Facebook
  • Blog
  • Listen to BJGP podcast
  • Subscribe BJGP on YouTube
Intended for Healthcare Professionals
British Journal of General Practice

Advanced Search

  • HOME
  • ONLINE FIRST
  • CURRENT ISSUE
  • ALL ISSUES
  • AUTHORS & REVIEWERS
  • SUBSCRIBE
  • BJGP LIFE
  • MORE
    • About BJGP
    • Conference
    • Advertising
    • eLetters
    • Alerts
    • Video
    • Audio
    • Librarian information
    • Resilience
    • COVID-19 Clinical Solutions
Editorials

Managing paediatric gastroenteritis in primary care: is there a role for ondansetron?

Peter J Gill, Elizabeth Thomas and Ann Van den Bruel
British Journal of General Practice 2021; 71 (711): 440-441. DOI: https://doi.org/10.3399/bjgp21X717089
Peter J Gill
The Hospital for Sick Children, Toronto, ON, Canada; Associate Scientist, Child Health Evaluative Sciences, SickKids Research Institute, Toronto, ON, Canada; Assistant Professor, Department of Paediatrics and Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada; Senior Associate, Centre for Evidence-Based Medicine, Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK.
Roles: Staff Physician
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Elizabeth Thomas
Centre for Evidence-Based Medicine, Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK.
Roles: DPhil Student
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Ann Van den Bruel
Academic Centre for Primary Care, Katholieke Universiteit Leuven, Leuven, Belgium.
Roles: Associate Professor
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • Article
  • Info
  • eLetters
  • PDF
Loading

Despite the reduction in hospital admissions1 and deaths2 due to the rotavirus vaccine, acute gastroenteritis remains a major cause of morbidity and healthcare service use worldwide. While typically a self-limited illness, the mainstay of therapy is oral rehydration therapy (ORT) to prevent the need for intravenous fluids and hospital admission due to severe dehyration.3 In 2006, a randomised controlled trial (RCT) by Freedman et al showed that a single dose of ondansetron in the emergency department (ED), compared with placebo, reduces the likelihood of vomiting and the need for intravenous rehydration.4 This seminal trial changed the standard of ED care for children with gastroenteritis but evidence was lacking for its use in primary care.

LATEST RESEARCH ON ONDANSETRON IN THE BJGP

In this issue of the BJGP, Bonvanie et al report an important pragmatic RCT evaluating the addition of oral ondansetron to usual care in children presenting with acute gastroenteritis in the out-of-hours primary care setting.5 The trial was conducted between 2015 and 2018 in three Dutch centres for out-of-hours care, and included children aged between 6 months and 6 years diagnosed with acute gastroenteritis — defined as ≥4 episodes of vomiting in the 24 hours before presenting, including one episode within 4 hours of presentation.

Usual care for children included the provision of ORT, either 10 ml/kg or 15 ml/kg for 4 hours based on hydration status along with administration instructions. Children randomised to the intervention group received a single dose of oral ondansetron syrup (0.1 mg/kg). The trial was open label without a placebo arm — participants, parents, GPs, and the research team were not blinded. The primary outcome was the proportion of children who continued vomiting in the first 4 hours after randomisation, while secondary outcomes included number of vomiting episodes in the first 4 hours, ORT intake, adverse events, specialist referrals, hospital admissions, and parental satisfaction.

Of the 1061 participants screened, 437 were eligible, of which 194 children were enrolled, 97 to each arm. The median age of children was 1.5 years, with a median duration of vomiting of 2 days with 71% reporting diarrhoea; the severity of illness was similar between groups. Children who received ondansetron had a 60% (95% confidence interval [CI] = 45% to 81%) reduction in vomiting within 4 hours (42.9% versus 19.5%; number needed to treat = 4), including a reduction in the number of vomiting episodes (incidence rate ratio 0.51, 95% CI = 0.29 to 0.88). However, there was no difference in referral rates (19.2% versus 19.7%) or hospital admission rates (13.7% versus 15.3%) between groups. Median intake of ORT in both groups was only 10 ml within 4 hours while 6.6% reported serious adverse events (such as seizures), with no differences between groups. Parental satisfaction, reported using a 5-point Likert scale, was higher in the ondansetron arm (P = 0.027).

STRENGTHS AND LIMITATIONS

Bonvanie et al’s trial has several strengths. First, it is an excellent example of community GPs working together to address an important clinical area in paediatrics. Nearly 600 GPs collaborated over the trial period, which is a testament to the importance of the topic and the nimble trial design. Second, despite the open-label design, baseline characteristics of both groups were similar. Third, the authors conducted a parallel controlled cohort study to look at those children who were not enrolled, and highlighted the ethical and logistical challenges in conducting a trial in children in primary care.6

However, there are important methodological limitations. First, unlike the original trial by Freedman et al, there was no placebo arm. Second, outcome assessors were not blinded: outcomes were ascertained by parent report, which would have directly influenced several outcomes (for example, parental satisfaction). Third, unlike the earlier studies that used a fast-tab ondansetron formulation, Bonvanie et al used an oral syrup formulation, which may have a longer onset of action. Fourth, the trial did not meet the expected sample size of 100 patients in each arm. Finally, the outcome was changed from referral to vomiting because of slow recruitment, which is unfortunate as referral would have been the stronger outcome.

COST-EFFECTIVENESS

A linked analysis by Weghorst et al in the present issue describes a cost-effectiveness analysis of the trial.7 Based on the primary outcome of vomiting within 4 hours, the incremental mean cost for an additional child free from vomiting in the first 4 hours was €9 (95% CI = −€41 to €3), but the CI includes potential increased costs. The difference in cost was driven by the indirect costs of maternal work absenteeism (€35.5/day), which was €287 in the usual care group and €151 in the ondansetron group. Yet, it is not clear how a reduction in vomiting within 4 hours could lead to a 4-day mean difference in maternal days of work missed. Lastly, the comparison excluded the cost of ondansetron (€0.25 to €0.37) yet included the cost of ORT (€0.18 per 25 ml). While the cost may be marginal, all costs should be considered in a cost-effectiveness analysis.

REALITIES OF PAEDIATRIC RESEARCH

The trial by Bonvanie et al highlights the inherent challenges of paediatric trials and why the evidence base in children lags behind that of adults.8 In the pilot trial, the medical ethics committee initially required that both parents sign consent for enrolment, consistent with Dutch national regulations. However, only 39% of visits had both parents, which would have made the trial not feasible, which was later modified to immediate written consent by one parent plus immediate verbal consent from the other, followed by written consent by the second parent at a later stage.6 Such an onerous ethical burden on families is an unreasonable impediment to including children in trials.9 The trial clearly shows the benefit of conducting a pilot study prior to full study enrolment, and importance of tracking patients who do not consent.

WHAT ARE THE IMPLICATIONS FOR THE MANAGEMENT OF ACUTE GASTROENTERITIS IN PRIMARY CARE?

Based on methodological limitations, we are cautious to recommend the adoption of ondansetron into routine care. While this pragmatic trial showed a reduction in vomiting within 4 hours, it had no impact on the amount of ORT provided, specialist referral, or hospital admission. There may be an important role for shared decision making with families that ondansetron may help in the short term by reducing vomiting, but we do not know whether it changes the natural history of the illness or avoids serious adverse events such as hospital admission. Future trials on ondansetron use in primary care should prioritise important clinical outcomes, such as hospital admission or amount of ORT provided.

This study highlights the need for greater emphasis on parental ORT education. In both groups, children were given a median of 10 ml of fluid over a 4-hour period. Based on the median weight of 11 kg, children should have received a minimum of 110 ml (10 ml/kg) or 165 ml (15 ml/kg). The main utility of ondansetron is to reduce vomiting to allow the provision of oral fluid — there is questionable benefit if this does not occur. Newer evidence from the ED setting supports the use of alternatives to oral rehydration solutions, such as diluted apple juice, which may be more palatable for young children.10

Future research should focus on two main avenues: 1) testing different solutions for ORT in primary care settings; and 2) developing ORT implementation strategies for those found to be optimal, which may or may not include pharmacological treatments. Clearly, more effort is needed on educating parents (and healthcare practitioners) on the provision of fluids and could successfully use newer communication tools (for example, whiteboard animation videos and animated graphics with narration).11 As is often the case in medicine, the search for a simple drug intervention highlights the critical role of non-drug interventions.

Notes

Provenance

Commissioned; not externally peer reviewed.

Competing interests

Peter J Gill has received grant funding from the Canadian Paediatric Society, Physician Services Incorporated (PSI), and the Canadian Institutes of Health Research (CIHR) in the past 5 years. He is on the editorial board of BMJ Evidence Based Medicine and on the Institute Advisory Board for the CIHR Institute of Human Development, Child and Youth Health, where he has expenses reimbursed to attend meetings. He is a member of the EBMlive steering committee, and he has expenses reimbursed to attend the conference. The remaining authors have declared no competing interests.

  • © British Journal of General Practice 2021

REFERENCES

  1. 1.↵
    1. Aliabadi N,
    2. Antoni S,
    3. Mwenda JM,
    4. et al.
    (2019) Global impact of rotavirus vaccine introduction on rotavirus hospitalisations among children under 5 years of age, 2008–16: findings from the Global Rotavirus Surveillance Network. Lancet Glob Health 7, 7, e893–e903.
    OpenUrl
  2. 2.↵
    1. Troeger C,
    2. Khalil IA,
    3. Rao PC,
    4. et al.
    (2018) Rotavirus vaccination and the global burden of rotavirus diarrhea among children younger than 5 years. JAMA Pediatr 172, 10, 958–965.
    OpenUrl
  3. 3.↵
    1. Freedman SB,
    2. Pasichnyk D,
    3. Black KJL,
    4. et al.
    (2015) Gastroenteritis therapies in developed countries: systematic review and meta-analysis. PLoS One 10, 6, e0128754.
    OpenUrl
  4. 4.↵
    1. Freedman SB,
    2. Adler M,
    3. Seshadri R,
    4. Powell EC
    (2006) Oral ondansetron for gastroenteritis in a pediatric emergency department. N Engl J Med 354, 16, 1698–1705.
    OpenUrlCrossRefPubMed
  5. 5.↵
    1. Bonvanie IJ,
    2. Weghorst AA,
    3. Holtman GA,
    4. et al.
    (2021) Oral ondansetron for paediatric gastroenteritis in primary care: a randomised controlled trial. Br J Gen Pract, DOI: https://doi.org/10.3399/BJGP.2021.0211.
  6. 6.↵
    1. Weghorst AA,
    2. Holtman GA,
    3. Wolters PI,
    4. et al.
    (2021) Recommendations for clinical research in children presenting to primary care out-of-hours services: a randomised controlled trial with parallel cohort study. BJGP Open, DOI: https://doi.org/10.3399/bjgpopen20X101154.
  7. 7.↵
    1. Weghorst AA,
    2. Holtman GA,
    3. Bonvanie IJ,
    4. et al.
    (2021) Cost-effectiveness of oral ondansetron for children with acute gastroenteritis in primary care: a randomised controlled trial. Br J Gen Pract, DOI: https://doi.org/10.3399/BJGP.2020.1093.
  8. 8.↵
    1. Groff ML,
    2. Offringa M,
    3. Emdin A,
    4. et al.
    (2020) Publication trends of pediatric and adult randomized controlled trials in general medical journals, 2005–2018: a citation analysis. Children (Basel) 7, 12, 293.
    OpenUrl
  9. 9.↵
    1. Schot MJC,
    2. Broekhuizen BDL,
    3. Cals JWL
    (2015) [Rules and regulations threaten non-pharmacological studies in children]. [Article in Dutch]. Ned Tijdschr Geneeskd 160, A9354.
    OpenUrl
  10. 10.↵
    1. Freedman SB,
    2. Willan AR,
    3. Boutis K,
    4. Schuh S
    (2016) Effect of dilute apple juice and preferred fluids vs electrolyte maintenance solution on treatment failure among children with mild gastroenteritis: a randomized clinical trial. JAMA 315, 18, 1966–1974.
    OpenUrlPubMed
  11. 11.↵
    1. Albrecht L,
    2. Scott SD,
    3. Hartling L
    (2018) Evaluating a knowledge translation tool for parents about pediatric acute gastroenteritis: a pilot randomized trial. Pilot Feasibility Stud 4, 131.
    OpenUrl
Back to top
Previous ArticleNext Article

In this issue

British Journal of General Practice: 71 (711)
British Journal of General Practice
Vol. 71, Issue 711
October 2021
  • Table of Contents
  • Index by author
Download PDF
Email Article

Thank you for recommending British Journal of General Practice.

NOTE: We only request your email address so that the person to whom you are recommending the page knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address.

Enter multiple addresses on separate lines or separate them with commas.
Managing paediatric gastroenteritis in primary care: is there a role for ondansetron?
(Your Name) has forwarded a page to you from British Journal of General Practice
(Your Name) thought you would like to see this page from British Journal of General Practice.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Citation Tools
Managing paediatric gastroenteritis in primary care: is there a role for ondansetron?
Peter J Gill, Elizabeth Thomas, Ann Van den Bruel
British Journal of General Practice 2021; 71 (711): 440-441. DOI: 10.3399/bjgp21X717089

Citation Manager Formats

  • BibTeX
  • Bookends
  • EasyBib
  • EndNote (tagged)
  • EndNote 8 (xml)
  • Medlars
  • Mendeley
  • Papers
  • RefWorks Tagged
  • Ref Manager
  • RIS
  • Zotero

Share
Managing paediatric gastroenteritis in primary care: is there a role for ondansetron?
Peter J Gill, Elizabeth Thomas, Ann Van den Bruel
British Journal of General Practice 2021; 71 (711): 440-441. DOI: 10.3399/bjgp21X717089
del.icio.us logo Digg logo Reddit logo Twitter logo CiteULike logo Facebook logo Google logo Mendeley logo
  • Tweet Widget
  • Facebook Like
  • Google Plus One
  • Mendeley logo Mendeley

Jump to section

  • Top
  • Article
    • LATEST RESEARCH ON ONDANSETRON IN THE BJGP
    • STRENGTHS AND LIMITATIONS
    • COST-EFFECTIVENESS
    • REALITIES OF PAEDIATRIC RESEARCH
    • WHAT ARE THE IMPLICATIONS FOR THE MANAGEMENT OF ACUTE GASTROENTERITIS IN PRIMARY CARE?
    • Notes
    • REFERENCES
  • Info
  • eLetters
  • PDF

More in this TOC Section

  • Practice-based pharmacists: considerations for general practices
  • Primary care: a national asset
  • Why should we prioritise smoking cessation for people with mental health conditions?
Show more Editorials

Related Articles

Cited By...

Intended for Healthcare Professionals

BJGP Life

BJGP Open

 

@BJGPjournal's Likes on Twitter

 
 

British Journal of General Practice

NAVIGATE

  • Home
  • Current Issue
  • All Issues
  • Online First
  • Authors & reviewers

RCGP

  • BJGP for RCGP members
  • BJGP Open
  • RCGP eLearning
  • InnovAiT Journal
  • Jobs and careers

MY ACCOUNT

  • RCGP members' login
  • Subscriber login
  • Activate subscription
  • Terms and conditions

NEWS AND UPDATES

  • About BJGP
  • Alerts
  • RSS feeds
  • Facebook
  • Twitter

AUTHORS & REVIEWERS

  • Submit an article
  • Writing for BJGP: research
  • Writing for BJGP: other sections
  • BJGP editorial process & policies
  • BJGP ethical guidelines
  • Peer review for BJGP

CUSTOMER SERVICES

  • Advertising
  • Contact subscription agent
  • Copyright
  • Librarian information

CONTRIBUTE

  • BJGP Life
  • eLetters
  • Feedback

CONTACT US

BJGP Journal Office
RCGP
30 Euston Square
London NW1 2FB
Tel: +44 (0)20 3188 7400
Email: journal@rcgp.org.uk

British Journal of General Practice is an editorially-independent publication of the Royal College of General Practitioners
© 2023 British Journal of General Practice

Print ISSN: 0960-1643
Online ISSN: 1478-5242