Lay Description

Nausea is a common symptom encountered in the Emergency Medical Services (EMS) environment that is often treated with oral or intravenous anti-emetic medications. Research Design/Plan: This will be a randomized equivalence study comparing the reduction in a patient's reported level of nausea after treatment with either Ondansetron or IPA Methods: Patients who report nausea and/or vomiting in the normal evaluation and care of after calling 911 for Emergency Medical Care will be offered enrollment in the study. A short script will be attached to the outside of each study packet providing information about the study and its risks and benefits. Verbal or written (waiver of informed consent will be requested) permission will be obtained to start randomization. If the patient agrees to enroll then the study packet will be opened and utilized. All Advanced Life Support Ambulances in the San Antonio Fire Department will have sealed numbered opaque boxes or envelopes with either: 70% Isopropyl Alcohol swabs or ondansetron. Six Visual Nausea Severity Scoring cards will be provided with a marking pen to record timed nausea levels before and upon arrival to the Emergency Department and 15 minutes after treatment whichever comes first.

Clinical Relevance: This treatment has not been studied in the unique environment encountered by Paramedics in the Pre-Hospital setting. If this treatment is found to be effective, it many offer a very simple, extremely inexpensive and non-invasive (basic life support) approach for the treatment of nausea.


IRB Number
NCT Number registration not required
Open to Enrollment


Eligible Ages
Between 18 Years and 99 Years
Eligible Genders
Accepts Healthy Volunteers

Inclusion Criteria

Exclusion Criteria

Study Design

Arm Groups

Study Contact

Principal Investigator
Mark Sparkman