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Last Updated: March 15, 2025

CLINICAL TRIALS PROFILE FOR ZYRTEC-D 12 HOUR


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505(b)(2) Clinical Trials for Zyrtec-d 12 Hour

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.
OTC NCT02865018 ↗ Neuromyelitis Optica (NMO) & Cetirizine Completed Icahn School of Medicine at Mount Sinai 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 Zyrtec-d 12 Hour

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00240032 ↗ A Study to Evaluate the Impact on Skin (Injection Site) Reactions of Taking an Antihistamine (Zyrtec®) or Placebo Prior to Daily Injections of Copaxone®. Completed Teva Branded Pharmaceutical Products R&D, Inc. Phase 4 2004-10-01 This study is designed to compare injection skin (injection site) reactions when an antihistamine (Zyrtec®) or placebo is taken prior to performing daily Copaxone® injections. Patients will be assigned (like a flip of a coin) to take either a placebo or an antihistamine (Zyrtec®) prior to performing their daily Copaxone® injections. The patient and physician will be unaware whether they are taking a placebo or antihistamine during the study.
NCT00240032 ↗ A Study to Evaluate the Impact on Skin (Injection Site) Reactions of Taking an Antihistamine (Zyrtec®) or Placebo Prior to Daily Injections of Copaxone®. Completed Teva Pharmaceutical Industries Phase 4 2004-10-01 This study is designed to compare injection skin (injection site) reactions when an antihistamine (Zyrtec®) or placebo is taken prior to performing daily Copaxone® injections. Patients will be assigned (like a flip of a coin) to take either a placebo or an antihistamine (Zyrtec®) prior to performing their daily Copaxone® injections. The patient and physician will be unaware whether they are taking a placebo or antihistamine during the study.
NCT00375713 ↗ Randomized Phase III Study to Evaluate the Efficacy and Safety of Xyzal® (Levocetirizine) vs Zyrtec® (Cetirizine) in Subjects With Dermatitis and Eczema Completed UCB Pharma Phase 3 2005-10-01 Korean double-blind non-inferiority study to asses the efficacy (as measured by the responder rate of pruritus severity score by the patient at visit 4 or end-of-treatment visit over the 2 weeks treatment period) and safety of Xyzal® to Zyrtec® in subjects suffering from dermatitis and eczema with pruritus symptoms
NCT00420082 ↗ A Randomized, Double-Blind, 4-way Crossover Study to Evaluate the Efficacy of Bilastine in the Vienna Challenge Chamber Completed Faes Farma, S.A. Phase 2 2006-10-01 This is a randomized, double blind, active and placebo controlled, 4 way crossover study in patients with seasonal allergic rhinitis. Patients will receive a single dose of bilastine 20 mg, Cetirizine 10 mg, Fexofenadine 120 mg, and placebo in the Vienna Challenge Chamber.
NCT00504933 ↗ Efficacy Study for the Symptomatic Treatment of Seasonal Allergic Rhinitis Completed Faes Farma, S.A. Phase 3 2005-05-01 The objective of the study is to evaluate the efficacy and tolerability of Bilastine 20 mg, compared to Cetirizine and placebo for the treatment of seasonal allergic rhinitis.
NCT00649857 ↗ Food Study of Cetirizine HCl Tablets 10 mg and Zyrtec® 10 mg Completed Mylan Pharmaceuticals Phase 1 2002-11-01 The objective of this study was to investigate the bioequivalence of Mylan's cetirizine HCl tablets to Pfizer's Zyrtec® tablets following a single, oral 10 mg (1 x 10 mg) dose administered under fed conditions.
NCT00650065 ↗ Fasting Study of Cetirizine HCl Tablets 10 mg and Zyrtec® Tablets 10 mg Completed Mylan Pharmaceuticals Phase 1 2002-11-01 "The objective of this study was to investigate the bioequivalence of Mylan cetirizine HCl 10 mg tablets to Pfizer's Zyrtec® 10 mg tablets following a single, oral 10 mg (1 x 10 mg) dose administration under fasting conditions.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for Zyrtec-d 12 Hour

Condition Name

Condition Name for Zyrtec-d 12 Hour
Intervention Trials
Healthy 6
Allergic Rhinitis 6
Seasonal Allergic Rhinitis 5
Perennial Allergic Rhinitis 4
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Condition MeSH

Condition MeSH for Zyrtec-d 12 Hour
Intervention Trials
Rhinitis 13
Rhinitis, Allergic 12
Rhinitis, Allergic, Seasonal 6
Rhinitis, Allergic, Perennial 4
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Clinical Trial Locations for Zyrtec-d 12 Hour

Trials by Country

Trials by Country for Zyrtec-d 12 Hour
Location Trials
United States 13
Canada 3
Austria 1
Korea, Republic of 1
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Trials by US State

Trials by US State for Zyrtec-d 12 Hour
Location Trials
Maryland 3
Texas 3
Georgia 1
Indiana 1
Illinois 1
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Clinical Trial Progress for Zyrtec-d 12 Hour

Clinical Trial Phase

Clinical Trial Phase for Zyrtec-d 12 Hour
Clinical Trial Phase Trials
Phase 4 12
Phase 3 5
Phase 2 1
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Clinical Trial Status

Clinical Trial Status for Zyrtec-d 12 Hour
Clinical Trial Phase Trials
Completed 27
Recruiting 1
Terminated 1
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Clinical Trial Sponsors for Zyrtec-d 12 Hour

Sponsor Name

Sponsor Name for Zyrtec-d 12 Hour
Sponsor Trials
Merck Sharp & Dohme Corp. 7
Faes Farma, S.A. 3
Mylan Pharmaceuticals 2
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Sponsor Type

Sponsor Type for Zyrtec-d 12 Hour
Sponsor Trials
Industry 28
Other 12
NIH 2
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Zyrtec-D 12 Hour: Clinical Trials, Market Analysis, and Projections

Introduction to Zyrtec-D 12 Hour

Zyrtec-D 12 Hour is a combination medication that includes the antihistamine cetirizine hydrochloride and the decongestant pseudoephedrine hydrochloride. This 2-in-1 allergy medicine is designed to provide relief from allergy symptoms and sinus congestion for up to 12 hours.

Clinical Trials Overview

Efficacy in Allergic Rhinitis

Several clinical trials have demonstrated the efficacy of Zyrtec-D 12 Hour in treating seasonal and perennial allergic rhinitis. Two multicenter, randomized, double-blind, placebo-controlled trials involving 1094 and 1000 patients, respectively, showed that Zyrtec-D significantly reduced the Total Symptom Severity Complex (TSSC) score, which includes symptoms such as sneezing, runny nose, itchy nose, itchy eyes, watery eyes, postnasal drip, and nasal congestion[1][4].

In these trials, patients aged 12 to 17 years also experienced significant symptom relief, indicating the medication's effectiveness across different age groups. Additionally, studies comparing cetirizine alone to placebo have shown that cetirizine is effective in improving rhinitis symptoms without altering pulmonary function in patients with mild to moderate asthma[1].

Pharmacokinetics and Pharmacodynamics

Clinical trials have also examined the pharmacokinetics of Zyrtec-D 12 Hour. When administered to healthy volunteers, the medication reached peak concentrations (Cmax) of 114 ng/mL for cetirizine and 309 ng/mL for pseudoephedrine at 2.2 and 4.4 hours post-dose, respectively. At steady-state concentrations, these values increased to 178 ng/mL for cetirizine and 526 ng/mL for pseudoephedrine[1].

Safety Profile

The safety profile of Zyrtec-D 12 Hour has been evaluated in multiple trials. Common adverse events reported include insomnia, dry mouth, fatigue, somnolence, pharyngitis, epistaxis, accidental injury, dizziness, and sinusitis. However, the overall rate of premature withdrawal due to adverse events was relatively low, at 2.0% compared to 1.1% in the placebo group[4].

Market Analysis

Market Demand and Competition

The market for over-the-counter (OTC) allergy medications is highly competitive, with several brands vying for market share. Zyrtec-D 12 Hour, however, stands out due to its combination of an antihistamine and a decongestant, providing comprehensive relief from both allergy symptoms and sinus congestion.

Customer Satisfaction and Reviews

Customer reviews and ratings indicate a high level of satisfaction with Zyrtec-D 12 Hour. On platforms like Metro Market, the product has an average customer rating of 4.83 out of 5, with many users praising its effectiveness in relieving allergy symptoms quickly and for an extended period[2].

Pricing and Availability

Zyrtec-D 12 Hour is widely available in pharmacies and online stores. The pricing is generally competitive, with a 24-tablet pack costing around $26.99, making it an accessible option for many consumers[2].

Market Projections

Growth in Allergy Medication Market

The global allergy medication market is expected to grow significantly due to increasing awareness of allergy treatments and the rising prevalence of allergic conditions. Zyrtec-D 12 Hour is well-positioned to capitalize on this trend, given its proven efficacy and user satisfaction.

Seasonal and Perennial Allergy Trends

Seasonal and perennial allergies continue to be a significant health issue, affecting millions of people worldwide. As the climate changes and pollen counts rise, the demand for effective allergy medications like Zyrtec-D 12 Hour is likely to increase.

Competitive Advantage

Zyrtec-D 12 Hour's unique formulation, which combines an antihistamine and a decongestant, provides a competitive advantage over single-action allergy medications. This dual-action approach ensures comprehensive relief, making it a preferred choice for many consumers.

Key Takeaways

  • Efficacy: Zyrtec-D 12 Hour has been shown to be effective in reducing symptoms of seasonal and perennial allergic rhinitis in multiple clinical trials.
  • Pharmacokinetics: The medication reaches peak concentrations within a few hours and maintains steady-state levels with twice-daily dosing.
  • Safety: Common adverse events are manageable, and the overall safety profile is favorable.
  • Market Demand: High customer satisfaction and competitive pricing position Zyrtec-D 12 Hour for continued market success.
  • Market Projections: The allergy medication market is expected to grow, and Zyrtec-D 12 Hour is well-positioned to benefit from this trend.

FAQs

What are the active ingredients in Zyrtec-D 12 Hour?

Zyrtec-D 12 Hour contains 5 mg of the antihistamine cetirizine hydrochloride and 120 mg of the decongestant pseudoephedrine hydrochloride[1][2].

How quickly does Zyrtec-D 12 Hour start working?

Zyrtec-D 12 Hour starts working within 30 minutes to an hour, with maximum levels reached in about 2-4 hours[3].

What are the common side effects of Zyrtec-D 12 Hour?

Common side effects include insomnia, dry mouth, fatigue, somnolence, pharyngitis, and dizziness[4].

Can Zyrtec-D 12 Hour be used by children?

Yes, Zyrtec-D 12 Hour is suitable for use by children 12 years and older[1][2].

How often should Zyrtec-D 12 Hour be taken?

Zyrtec-D 12 Hour is typically taken twice daily for complete relief from allergy symptoms[3].

Sources

  1. FDA Label: ZYRTEC-D 12 HOUR Extended Release Tablets - accessdata.fda.gov
  2. Metro Market: Zyrtec-D Tablets - metromarket.net
  3. SingleCare: Zyrtec vs. Zyrtec-D: Differences, similarities, and which is better for you - singlecare.com
  4. RxList: Zyrtec-D (Cetirizine, Pseudoephedrine) - rxlist.com
  5. Pharmacy Times: A Clinical Review of 24-Hour OTC Antihistamines for Allergy Symptom Relief - pharmacytimes.com

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