Ondansetron VS Doxylamine and Pyridoxine in Treating Nausea of Pregnancy

April 4, 2016 updated by: United States Naval Medical Center, San Diego

Is Zofran Superior to Pyridoxine at Reducing Nausea and Vomiting in Pregnancy

Our purpose is to determine whether ondansetron, a commonly used antiemetic, is equivalent in efficacy to the combination of pyridoxine and doxylamine, the currently recommended first line therapy for nausea and vomiting in pregnancy by the American Congress of Obstetricians and Gynecologists (ACOG). Since both treatments are safe in pregnancy, many physicians are using ondansetron as first line in practice. Despite this practice and the recommendations from ACOG, there is not data to suggest that ether practice is superior. This will be the first prospective, randomized, double blind, controlled trial comparing the two treatments. We hypothesize that ondansetron will be equally efficacious in reducing nausea and episodes of emesis. By alleviating nausea and vomiting associated with pregnancy, patients will likely benefit from less Emergency Department visits, urgent clinic visits, and admissions for progression to hyperemesis gravidarum.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

36

Phase

  • Not Applicable

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

  • United States
    • California
      • San Diego, California, United States, 92134
        • Naval Medical Center, San Diego

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

16 years to 88 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Women who are less than 16 weeks pregnant by last menstrual period or ultrasound
  • Greater than 18 years of age
  • English speaking
  • No significant visual or hearing impairment
  • Requesting treatment for nausea associated with pregnancy

Exclusion Criteria:

  • If nausea or vomiting preexisted the pregnancy
  • Requires hospitalization at the time of initial enrollment
  • Already taking anti-emetics to include metoclopramide, ondansetron, doxylamine, pyridoxine, or promethazine
  • The patient has an allergy to either study regimen
  • If they are unable to return for a follow up visit in 1 week

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
Experimental: Ondansetron
study drug
Drug: Ondansetron
Ondansetron 4mg and a placebo capsule to be taken orally every 8 hours for 5 days.
Other Names:
  • Zofran
No Intervention: Doxylamine and Pyridoxine (vitamin B6)
other nausea treatment in use

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Reduction of nausea on the VAS (Visual Analog Scale)
Time Frame: 5 days
5 days

Secondary Outcome Measures

Outcome Measure
Time Frame
Reduction in vomiting on the VAS
Time Frame: 5 days
5 days
Any adverse effects caused by the study medications.
Time Frame: 5 days
5 days

Collaborators and Investigators

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

Sponsor

United States Naval Medical Center, San Diego

Investigators

  • Principal Investigator: Lauren G Oliveira, DO, United States Naval Medical Center, San Diego

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.

General Publications

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

October 1, 2012

Primary Completion (Actual)

October 1, 2012

Study Completion (Actual)

April 1, 2013

Study Registration Dates

First Submitted

August 15, 2012

First Submitted That Met QC Criteria

August 15, 2012

First Posted (Estimate)

August 17, 2012

Study Record Updates

Last Update Posted (Estimate)

April 6, 2016

Last Update Submitted That Met QC Criteria

April 4, 2016

Last Verified

April 1, 2016

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CIP#NMCSD.2011.0151

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

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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