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Comparing Standard-Dose and High-Dose Cetirizine for Acute Urticaria
Sponsor: University of Phayao
Summary
The goal of this clinical trial is to learn whether a higher dose of cetirizine works better than the standard dose to relieve symptoms of acute urticaria (hives) in adults. The study also aims to learn about the safety of taking a higher dose for a short period of time. The main questions the study aims to answer are: Does the higher dose of cetirizine help people with acute urticaria improve faster than the standard dose? What side effects do participants experience when taking the higher dose? Researchers will compare two groups: one group taking the standard dose of cetirizine (10 mg per day) and another group taking a higher dose (40 mg per day). This will help researchers understand which dose works better and whether the higher dose is safe. Participants will: Take the assigned study medication for 7 days Record their daily symptoms, including itch and hive severity Return for follow-up visits on Day 3, Day 7, and Week 6 Have blood tests to check liver and kidney function before and after treatment This study may help improve treatment options for people with acute urticaria and reduce the need for unnecessary steroid use.
Official title: Comparative Efficacy of Standard-Dose Versus Updosed Cetirizine in Acute Urticaria: A Randomized Controlled Trial
Key Details
Gender
All
Age Range
18 Years - 60 Years
Study Type
INTERVENTIONAL
Enrollment
140
Start Date
2025-11
Completion Date
2026-10
Last Updated
2025-11-19
Healthy Volunteers
No
Conditions
Interventions
Cetirizine 10 mg
Participants in the standard-dose arm receive cetirizine 10 mg orally once daily for 7 days. The study medication is provided in capsule form to match the appearance of the high-dose capsules.
Cetirizine 40 mg
Participants in the high-dose arm receive cetirizine 20 mg orally twice daily (total 40 mg/day) for 7 days. The study medication is provided in capsule form to ensure identical appearance between arms.
Locations (1)
University of Phayao Hospital
Phayao, Muang, Thailand