Is Levocetirizine Less Sedating Than Cetirizine?

ClinicalTrials.gov ID: NCT00826943

Public ClinicalTrials.gov record NCT00826943. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

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ClinicalTrials.gov public records Last synced Oct 19, 2026, 3:15 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

Is Levocetirizine Less Sedating Than Cetirizine? A Randomized, Double-blind, Placebo Controlled Trial.

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

The purpose of this study is to determine whether cetirizine (zyrtec), levocetirizine (xyzal), and placebo differ in the degree of sedation they produce and their relief of allergy symptoms.

Study identification

NCT ID: NCT00826943
Recruitment status: Completed
Study type: Interventional
Phase: Phase 4
Lead sponsor: Vanderbilt University; Other
Enrollment: 30 participants

Conditions and interventions

Conditions

Allergic Rhinitis

Interventions

Drug

Eligibility (public fields only)

Age range: 18 Years to 77 Years
Sex: All
Healthy volunteers: Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date: Jan 2009 (Type not available)
Primary completion: May 2009 (Actual)
Completion: May 2009 (Actual)
Last update posted: Feb 20, 2014

2009

United States locations

U.S. sites: 1
U.S. states: 1
U.S. cities: 1

Facility	City	State	ZIP	Site status
Vanderbilt University Asthma, Sinus, and Allergy Clinic	Nashville	Tennessee	37203	—

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows: Public field values for ClinicalTrials.gov record NCT00826943, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do: No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from: Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh: Last update posted Feb 20, 2014 · Synced Oct 19, 2026

Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT00826943 live on ClinicalTrials.gov.

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