Ondansetron Administration to WELL Children With Gastroenteritis Associated Vomiting in EDs in Pakistan (OWEP)

February 28, 2018 updated by: Dr. Stephen Freedman

Ondansetron Administration to WELL Children With Gastroenteritis Associated Vomiting in Emergency Departments in Pakistan

The primary objective is to determine if the administration of a single dose of oral ondansetron (an anti-vomiting medication), compared to placebo, results in a reduction in intravenous (IV) rehydration therapy in children presenting for emergency department care with vomiting and diarrhea in Pakistan.

Study Overview

Status

Completed

Intervention / Treatment

Detailed Description

Gastroenteritis remains one of the most common causes of morbidity and mortality in children <5 years of age worldwide. A critical factor in the reduction in mortality over the past 30 years has been the introduction of oral rehydration therapy (ORT) for the treatment of dehydration.

However, its use has stagnated in many low- and middle-income countries (LMIC) where many children lack access to alternatives such as intravenous (IV) rehydration. When such children have fluid losses that cannot be replaced orally due to intractable vomiting, death is common. Finding a safe, non-invasive, and effective strategy to reduce vomiting in children would substantially decrease the need for IV rehydration and hence morbidity and mortality in LMICs. Although antiemetic agents are included in the WHO list of Essential Medicines, their use in children with gastroenteritis is not endorsed by the World Health Organization (WHO). Concerns include a lack of evidence that antiemetic agents can improve outcomes and that they are associated with dangerous side effects. However, in high-income settings, studies on ondansetron, an antiemetic agent, have demonstrated that it can reduce vomiting, IV rehydration, and hospitalization. Recent reviews by prominent organizations (e.g. International child Health Review Collaboration; the Committee on the Selection and Use of Essential Medicines) have indicated an interest in ondansetron use in children with gastroenteritis, and they have concluded that further evidence is required. This trial aims to determine if the administration of a single dose of oral ondansetron results in improved outcomes in children brought for emergency department care with vomiting and diarrhea in Pakistan.

Two trials will be conducted under the umbrella of one study. The proposed trials will be identical with the exception of the severity of dehydration at enrollment (either "some" or none "well"). The trials will have the following specific aims:

  1. To determine, in children 6 - 59 months of age with AGE with vomiting and diarrhea who have "NO" dehydration, if there is a reduction in the proportion of children administered IV rehydration in those who receive oral ondansetron in addition to all WHO standards of care, compared to those receiving an oral placebo in addition to all WHO standards of care.
  2. To determine, in children 6 - 59 months of age with AGE with vomiting and diarrhea who have "SOME" dehydration, if there is a reduction in the proportion of children administered IV rehydration in those who receive oral ondansetron in addition to all WHO standards of care, compared to those receiving an oral placebo in addition to all WHO standards of care.

IV rehydration is a powerful marker of treatment failure and reducing the need for IV rehydration therapy in either of these 2 groups of children will be viewed as a significant advance by healthcare providers and decision makers. Previous studies of ondansetron have not been conducted in low and middle income countries (LMIC), have been of relatively small sample sizes, have not employed WHO dehydration scales, and have not focused on young children (i.e. <5 years). As such therapy is unavailable to a large number of children in LMIC countries, the ability to demonstrate that ondansetron can reduce the use of IV rehydration will provide compelling evidence that this drug has the potential to save lives around the world. We postulate that oral ondansetron administration to children in LMIC, if beneficial in our study population, could serve as a feasible and reliable intervention that is available for provision by non-hospital based, outreach, and healthcare providers in remote regions of the world.

This study may have immediate impact on patient management. Based on the results, it will be discovered if oral ondansetron plays a role in reducing the need for intravenous rehydration in children with gastroenteritis in Pakistan. As ondansetron is now available in generic formulations, and is relatively inexpensive, it is anticipated that if this study is positive, ondansetron will be considered for inclusion in the WHO - gastroenteritis care package. This could ultimately lead to a decrease in the need for intravenous rehydration in children in countries such as Pakistan.

Study Type

Interventional

Enrollment (Actual)

625

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Karachi, Pakistan
        • Aga Khan University Hospital
      • Kharadar, Karachi, Pakistan
        • Aga Khan Hospital for Women and Children (AKHWC)

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

6 months to 4 years (Child)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Age 6 - 59 months (0.5 - 5 years)
  • Symptoms consistent with gastroenteritis (must have a & b)

    1. 1 episode of nonbilious, nonbloody vomiting within the 4 hours preceding triage The requirement for only 1 vomiting episode is based on prior work which similarly required 1 vomiting episode within 4 hours of triage. The later study reported a 17% absolute reduction in the use of IV rehydration. The vast majority of children seeking care and enrolled in the aforementioned study had a significantly greater number of vomiting episodes in the preceding 24 hour (mean >9 episodes).
    2. Presence of ≥ 1 episode of diarrhea during the illness We require the presence of only 1 diarrheal stool to enhance our probability of enrolling children with enteritis (as opposed to other diagnoses). In fact, of the 8 RCTs performed using antiemetics in children with gastroenteritis in developed countries, only 1 even required the presence of any diarrhea as part of the eligibility criteria (and that study required a single diarrheal stool).
  • Presence of NO dehydration (NO=not enough signs to classify as some or severe dehydration)

Exclusion Criteria:

  • Weight <8 kg
  • Vomiting or diarrhea for > 7 days
  • Malnutrition: The World Health Organization (WHO) definition will be employed - weight for height below -3z scores of the median WHO growth standards
  • Severe dehydration (WHO criteria) or hypotension defined as a systolic blood pressure <70 mm Hg in infants 1 month to 12 months, < 70 mm Hg + (2 x age in years) in children 1-10 years, < 90 mm Hg in children ≥ 10 years
  • Prior abdominal surgery (excluding hernia)
  • Bilious or bloody vomitus
  • Known hypersensitivity to ondansetron or any serotonin receptor antagonist
  • History or family history of prolonged QT syndrome
  • Taking apomorphine or any medication that is generally accepted as having a risk of causing torsades de pointes
  • Patients previously enrolled in the study
  • Follow-up will not be possible

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: Placebo (sugar pill)
Eligible children will receive one dose of an oral disintegrating Placebo (sugar pill) tablet. Subsequent therapy will be in accordance with World Health Organization guidelines as dictated by the child's hydration status.
Other Names:
  • Sugar Pill
Experimental: Ondansetron

4 mg oral disintegrating tablet of ondansetron

Participant weight 8-15 kg = half dose (2mg) Participant weight greater than 15 kg = full dose (4mg)

Eligible children will receive one weight based (0.13 - 0.26 mg/kg) dose of an oral ondansetron disintegrating tablet. Subsequent therapy will be in accordance with World Health Organization guidelines as dictated by the child's hydration status.
Other Names:
  • Zofran

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Intravenous (IV) Rehydration
Time Frame: within 72 hours of randomization
IV rehydration is defined as the IV administration of ≥20 ml/kg over 4 hours of an isotonic fluid for the purpose of rehydration within 72 hours of randomization. This definition allows for the occurrence of the primary outcome in children who receive maintenance plus replacement of losses and not simply those who receive a fluid bolus. This will not include those who simply receive maintenance fluids (e.g. 4 ml/kg/hr for those weighing < 10 kg). This will also enable us to exclude children who undergo IV insertion for the purpose of medication administration. IV rehydration is a powerful marker of treatment failure, a decrease in which is likely to impact practice and influence decision makers since it is drastically more expensive that ORT, it is painful and is associated with a greater risk of adverse events.
within 72 hours of randomization

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
The proportion of children who vomit during the 4 hour observation period
Time Frame: within 4 hour observation period after randomization
within 4 hour observation period after randomization
The frequency of vomiting during the 4 hour observation period
Time Frame: within 4 hour observation period after randomization
within 4 hour observation period after randomization
Hospitalization > 24 hours
Time Frame: 72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment
Total length of stay from Emergency Department (ED) arrival until discharge of > 24 hours, regardless of whether time is spent in the ED or inpatient unit
72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment
Volume of Oral Rehydration Solution (ORS) consumed (ml/kg) during the 4 hour observation period
Time Frame: within 4 hour observation period after randomization
within 4 hour observation period after randomization
Number of diarrheal stools during the 72 hours following randomization
Time Frame: within 72 hours of randomization
Diarrheal stools are defined, in keeping with the WHO definition as "loose or liquid stools"
within 72 hours of randomization
Treatment failure
Time Frame: 72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment

This aggregate outcome will include children who experience the following:

  1. IV rehydration as defined in primary outcome
  2. Nasogastric rehydration for > 24 hours - this implies a failure of outpatient Oral Rehydration Therapy (ORT)
  3. Death within 72 hours (from any cause; in or out of hospital)
72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment
Response based on infectious etiology (i.e. bacterial vs. viral), duration of illness (i.e. < 48 vs. ≥ 48 hours), and age (< 18 months vs. ≥ 18 months)
Time Frame: 72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment
72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment
Development of "SOME" dehydration during the 72 hours following randomization amongst children who are discharged
Time Frame: within 72 hours of randomization

All children will be presumed to not be dehydrated at the time of discharge regardless of severity of dehydration at the time of ED presentation.

SOME Dehydration = 2 or more of the following signs:

  • Restlessness, irritability
  • Sunken Eyes
  • Drinks eagerly, thirsty
  • Skin pinch goes back slowly
within 72 hours of randomization

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Major Side Effects
Time Frame: 72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment
Uncommon events such as: Arrythmia and Death. This data is critical to estimate a safety profile of ondansetron in low to middle income countries
72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment
Semi- and Intensive Care Unit Admission
Time Frame: 72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment
This data is critical to estimate a safety profile of ondansetron in low to middle income countries
72 hours after randomization; 24 hour follow up as needed; chart review 21 days after enrollment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 1, 2014

Primary Completion (Actual)

January 20, 2017

Study Completion (Actual)

February 3, 2017

Study Registration Dates

First Submitted

May 30, 2013

First Submitted That Met QC Criteria

June 3, 2013

First Posted (Estimate)

June 6, 2013

Study Record Updates

Last Update Posted (Actual)

March 2, 2018

Last Update Submitted That Met QC Criteria

February 28, 2018

Last Verified

February 1, 2018

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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