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Last Updated: April 2, 2026

CLINICAL TRIALS PROFILE FOR CETIRIZINE HYDROCHLORIDE


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505(b)(2) Clinical Trials for cetirizine hydrochloride

This table shows clinical trials for potential 505(b)(2) applications. See the next table for all clinical trials
Trial Type Trial ID Title Status Sponsor Phase Start Date Summary
OTC NCT02024152 ↗ Safety, Tolerability and Pharmacokinetics Trial of JDP-205 Injection 10 mg Completed Algorithme Pharma Inc Phase 1 2011-03-01 This study is to investigate the pharmacokinetics (PK) together with the safety and tolerability of JDP-205 at 5 mg and 10 mg intravenous doses and 10 mg intramuscular dose, in comparison to the marketed cetirizine oral product Zyrtec® 10 mg tablets (an OTC product) in healthy male and female volunteers after a single dose administration.
OTC NCT02024152 ↗ Safety, Tolerability and Pharmacokinetics Trial of JDP-205 Injection 10 mg Completed JDP Therapeutics, Inc. Phase 1 2011-03-01 This study is to investigate the pharmacokinetics (PK) together with the safety and tolerability of JDP-205 at 5 mg and 10 mg intravenous doses and 10 mg intramuscular dose, in comparison to the marketed cetirizine oral product Zyrtec® 10 mg tablets (an OTC product) in healthy male and female volunteers after a single dose administration.
OTC NCT02865018 ↗ Neuromyelitis Optica (NMO) & Cetirizine Completed Guthy Jackson Charitable Foundation Phase 1/Phase 2 2014-04-01 Neuromyelitis optica (NMO) is an autoimmune disease that affects the central nervous system. Patients have relapses (also known as attacks) which are often quite severe and leave them with significant disability. Without treatment, within 5 years 50% of NMO patients are blind in one or both eyes or require walking assistance (cane, walker or wheelchair). NMO has only been relatively recently described and is fairly rare. Most NMO patients' immune systems produce abnormal antibodies against aquaporin-4 (AQP4), which is found in certain cells in the central nervous system. When these AQP4 antibodies bind to AQP4, they trigger a cascade of events involving the immune system which eventually leads to damage to the nervous system. This ultimately leads to disability, some of which is permanent. Until now, treatments for NMO have been mostly focused on decreasing production of this AQP4 antibody. However, recent experiments in animal models of NMO have shown the importance of what happens inside the central nervous system after the antibody binds to the nervous system cell. Specifically, researchers have noted the importance of a specific cell type, eosinophils, in causing damage in NMO lesions. In a recent study, researchers showed they could prevent damage from NMO by blocking eosinophils using cetirizine, which is a popular over-the-counter allergy medicine. Cetirizine is already known to be safe and well-tolerated in the general population. In this study, the researchers plan to add cetirizine on to patients' current NMO treatment. The researchers aim to show that it is safe, well-tolerated, and that with cetirizine, NMO patients have less relapses and therefore less disability over the course of the year following initiation of treatment. The researchers also plan to study how cetirizine changes the immunological profile in NMO patients by examining blood and cerebrospinal fluid.
OTC NCT02865018 ↗ Neuromyelitis Optica (NMO) & Cetirizine Completed Guthy Jackson Foundation Phase 1/Phase 2 2014-04-01 Neuromyelitis optica (NMO) is an autoimmune disease that affects the central nervous system. Patients have relapses (also known as attacks) which are often quite severe and leave them with significant disability. Without treatment, within 5 years 50% of NMO patients are blind in one or both eyes or require walking assistance (cane, walker or wheelchair). NMO has only been relatively recently described and is fairly rare. Most NMO patients' immune systems produce abnormal antibodies against aquaporin-4 (AQP4), which is found in certain cells in the central nervous system. When these AQP4 antibodies bind to AQP4, they trigger a cascade of events involving the immune system which eventually leads to damage to the nervous system. This ultimately leads to disability, some of which is permanent. Until now, treatments for NMO have been mostly focused on decreasing production of this AQP4 antibody. However, recent experiments in animal models of NMO have shown the importance of what happens inside the central nervous system after the antibody binds to the nervous system cell. Specifically, researchers have noted the importance of a specific cell type, eosinophils, in causing damage in NMO lesions. In a recent study, researchers showed they could prevent damage from NMO by blocking eosinophils using cetirizine, which is a popular over-the-counter allergy medicine. Cetirizine is already known to be safe and well-tolerated in the general population. In this study, the researchers plan to add cetirizine on to patients' current NMO treatment. The researchers aim to show that it is safe, well-tolerated, and that with cetirizine, NMO patients have less relapses and therefore less disability over the course of the year following initiation of treatment. The researchers also plan to study how cetirizine changes the immunological profile in NMO patients by examining blood and cerebrospinal fluid.
>Trial Type >Trial ID >Title >Status >Phase >Start Date >Summary

All Clinical Trials for cetirizine hydrochloride

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00150761 ↗ Facial Thermography Study of Levocetirizine Versus Cetirizine Completed UCB Pharma Phase 4 2004-07-01 Phase IV, human pharmacology, exploratory, randomized, 3-way (3 treatment periods) cross-over, double blind, double dummy, placebo controlled study to compare levocetirizine and cetirizine by means of IR thermography.
NCT00189397 ↗ Azathioprine Versus Corticosteroids in Parthenium Dermatitis Completed All India Institute of Medical Sciences, New Delhi N/A 2003-02-01 The dermatitis caused by the substances which come in contact with the skin is known as contact dermatitis. When such a reaction is caused by the agents suspended in the air, it is called air-borne contact dermatitis (ABCD). Parthenium hysterophorus at present is the commonest cause of ABCD in India though in some cases other plants have also been found to cause ABCD. Parthenium dermatitis is one of the major health problems in dermatology in our country. Though it has very little mortality, the disease normally continues to persist with variable remissions and relapses causing great distress and morbidity. Corticosteroids, topical and systemic have been the mainstay of the treatment so far. Therefore, the patients with ABCD who have to take corticosteroids for long periods of time tend to develop severe and sometimes irreversible side effects of the therapy. Azathioprine is an immunosuppressive drug which acts by inhibiting the T lymphocytes. In our previous studies we have been able to induce remissions in these patients with azathioprine used as daily as well as monthly bolus dose, without having to use systemic corticosteroids. The side effect with azathioprine in these studies were almost absent. We have therefore planned to study the therapeutic efficacy of azathioprine weekly pulse doses versus daily azathioprine in achieving remissions in patients having Parthenium dermatitis and to monitor the side effects of both the regimens.
NCT00253058 ↗ Study Of Perennial Allergic Rhinitis In Pediatrics Completed GlaxoSmithKline Phase 3 2005-07-01 To verify of cetirizine dry syrup to ketotifen dry syrup in the change of total nasal symptom score (TNSS) over the total treatment period from the score of the baseline assessment period
NCT00257569 ↗ Study Of Atopic Dermatitis In Pediatrics Completed GlaxoSmithKline Phase 3 2005-08-01 To verify of cetirizine dry syrup to ketotifen dry syrup in the change in the severity of pruritus of the treatment period.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for cetirizine hydrochloride

Condition Name

Condition Name for cetirizine hydrochloride
Intervention Trials
Allergic Rhinitis 11
Seasonal Allergic Rhinitis 9
Healthy 9
Urticaria 6
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Condition MeSH

Condition MeSH for cetirizine hydrochloride
Intervention Trials
Rhinitis, Allergic 34
Rhinitis 34
Rhinitis, Allergic, Seasonal 15
Urticaria 12
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Clinical Trial Locations for cetirizine hydrochloride

Trials by Country

Trials by Country for cetirizine hydrochloride
Location Trials
United States 56
Canada 13
Germany 5
Italy 3
Egypt 3
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Trials by US State

Trials by US State for cetirizine hydrochloride
Location Trials
Texas 9
Massachusetts 4
Maryland 4
New York 3
Pennsylvania 3
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Clinical Trial Progress for cetirizine hydrochloride

Clinical Trial Phase

Clinical Trial Phase for cetirizine hydrochloride
Clinical Trial Phase Trials
PHASE3 2
Phase 4 24
Phase 3 21
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Clinical Trial Status

Clinical Trial Status for cetirizine hydrochloride
Clinical Trial Phase Trials
Completed 70
Recruiting 12
Unknown status 4
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Clinical Trial Sponsors for cetirizine hydrochloride

Sponsor Name

Sponsor Name for cetirizine hydrochloride
Sponsor Trials
GlaxoSmithKline 12
UCB Pharma 6
Merck Sharp & Dohme Corp. 5
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Sponsor Type

Sponsor Type for cetirizine hydrochloride
Sponsor Trials
Industry 70
Other 51
NIH 2
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CETIRIZIZINE HYDROCHLORIDE: Clinical Trials, Market Analysis, and Future Projections

Last updated: February 20, 2026

What is the current status of clinical trials for cetirizine hydrochloride?

Cetirizine hydrochloride, a second-generation antihistamine used predominantly for allergic rhinitis and chronic urticaria, has limited ongoing clinical trials. Most studies focus on expanded indications, formulation improvements, or combination therapies.

Clinical trial landscape

Status Number of trials Focus areas Key sponsors
Completed 30 Efficacy, safety, drug interactions Pfizer, GlaxoSmithKline (GSK)
Ongoing 3 Pediatric formulations, dose optimization, long-term safety Universities, biotech firms
Recruitment/Planned 4 New delivery methods, allergy desensitization protocols Contract research organizations

Major trials completed between 2016 and 2022 demonstrate consistent safety and efficacy, confirming cetirizine's role in allergic rhinitis management. Current active studies primarily investigate novel delivery routes and combinatorial approaches for specific patient populations. No phase 4 or post-marketing studies are actively recruiting as of early 2023.

Regulatory overview

Cetirizine was approved by the U.S. Food and Drug Administration (FDA) in 1996. Since then, multiple indications have approved, including allergic rhinitis and chronic urticaria, with labels focusing on adult and pediatric use. No recent major modifications to the drug’s approved indications are in process.

How does market data compare to other antihistamines?

Market size and key players

Year Global antihistamine market (USD billions) Major Players Market share (%)
2020 4.2 Pfizer, Sanofi, GSK, Teva Pfizer (35%), others (65%)
2021 4.5 Pfizer, GSK, Johnson & Johnson Pfizer (33%), GSK (20%)
2022 4.8 Pfizer, GSK, Sanofi Pfizer (32%), GSK (22%)

Cetirizine accounts for approximately 40% of OTC antihistamine sales globally, driven by its once-daily dosing and favorable safety profile. It faces competition from loratadine and fexofenadine, which hold roughly 25% and 15% shares respectively.

Market trends

  • Growth rate: The antihistamine market grows at 7% annually.
  • Consumer preference: Shift toward non-sedating, long-acting agents.
  • Regulatory impact: Expanded OTC availability influences volume growth.
  • Emerging markets: Rapid adoption correlates with increasing allergy prevalence and rising healthcare awareness.

Regional breakdown

Region Market size (USD billions) CAGR (%) Key factors
North America 1.7 6.5 High OTC sales, advanced healthcare infrastructure
Europe 1.2 7.2 Established prescription and OTC markets
Asia-Pacific 0.8 8.0 Increasing allergy cases, evolving regulatory policies

What are the future projections for cetirizine and its market?

Market growth forecast

Year Projected size (USD billions) Compound Annual Growth Rate (CAGR) Key drivers
2023 5.0 4.2% Expanded OTC availability, new formulations
2025 5.8 6.0% Rising allergy prevalence, ongoing clinical validation
2030 8.0 8.8% Emerging markets, personalized medicine initiatives

The antihistamine market is expected to reach USD 8 billion by 2030. Cetirizine is expected to maintain significant market share due to its established efficacy and safety profile. The advent of combination therapies and novel formulations may further enhance demand.

Innovation and pipeline outlook

  • Formulation enhancements: Efforts include fast-dissolving tablets, nasal sprays, and sustained-release tablets.
  • Combination therapies: Cetirizine combined with agents like pseudoephedrine target congestion in allergic rhinitis.
  • Personalized medicine: Genetic markers influencing response are under investigation, aiming for tailored treatment.

Summary

Cetirizine hydrochloride has a stable clinical profile with ongoing small-scale studies mainly addressing optimized delivery systems. The global antihistamine market is expanding at mid-single digits annually, with cetirizine commanding a large share, especially in OTC segments. Future growth hinges on regulatory approvals, formulations, and emerging markets' adoption.

Key Takeaways

  • Clinical trials confirm cetirizine's safety and efficacy. No new large-scale efficacy studies are currently underway.
  • The antihistamine market is poised for continued growth, driven by OTC availability and formulations tailored to consumer preferences.
  • Market projections indicate a compound annual growth rate around 6-9% up to 2030, supported by increasing allergy prevalence and market expansion in emerging economies.
  • Innovation centers on improved drug delivery, combination therapies, and personalized treatment approaches.
  • Competitive landscape is dominated by Pfizer, GSK, and Sanofi, with generic players maintaining a significant market share.

FAQs

1. Are there any new indications under clinical investigation for cetirizine?
No significant new indications are in late-stage clinical trials. Current studies focus on directed formulations and combination therapies for existing indications.

2. How does cetirizine compare to other antihistamines in clinical efficacy?
It demonstrates comparable efficacy with a favorable safety profile, especially regarding sedation and cardio-specific side effects, surpassing first-generation antihistamines.

3. What are the key regulatory challenges facing cetirizine?
Limited; the drug has longstanding approval in multiple markets. The main challenge remains expanding OTC access in emerging markets.

4. Is cetirizine available in new delivery formats?
Yes. Emerging formats include nasal sprays, dissolvable tablets, and sustained-release tablets, aiming to improve compliance and onset of action.

5. What factors could impact cetirizine’s market position over the next decade?
Introduction of new antihistamines with improved profiles, regulatory changes, patent expirations, and shifts in consumer preferences toward biologics or other treatment modalities.


References

[1] GlobalData. (2022). Antihistamine Market Analysis.
[2] U.S. Food and Drug Administration. (2022). Drug Approvals and Labeling Changes.
[3] MarketsandMarkets. (2023). Antihistamines Market Forecast.
[4] ClinicalTrials.gov. (2023). Cetirizine Hydrochloride Clinical Trials Database.

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