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Last Updated: December 12, 2025

CLINICAL TRIALS PROFILE FOR ZEGERID


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505(b)(2) Clinical Trials for ZEGERID

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 NCT01077076 ↗ Pharmacodynamic Study Comparing the Effects of Two Different Forms of Omeprazole (P07812) (COMPLETED) Completed Bayer Phase 3 2008-12-01 This randomized, crossover study is to evaluate the early effectiveness, defined as effect on intragastric pH during the first 4 hours after dosing, of Zegerid, Prilosec over-the-counter (OTC) Tablets, and placebo on the 4th day of treatment to inhibit acid secretion. Additional purposes are to: 1. provide pharmacodynamic evidence comparing 24-hr inhibition of acid secretion on the 1st, 4th, and 11th days of dosing with each of the indicated treatments; 2. compare Zegerid and Prilosec OTC for achieving their steady-state effects for controlling 24-hr gastric acidity at steady-state on the 4th and 11th day of dosing. 3. evaluate early effectiveness, defined as effect on intragastric pH during the first 4 hours after administration, of Zegerid, Prilosec OTC Tablets, and placebo on acid inhibition at steady-state when administered on the 11th day of dosing.
>Trial Type >Trial ID >Title >Status >Phase >Start Date >Summary

All Clinical Trials for ZEGERID

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00557349 ↗ Ulcer Prevention Study in Post Gastric Bypass Patients Completed University of Missouri-Columbia Phase 4 2006-11-01 This research is to determine which medication, Zegerid (Omeprazole/Sodium Bicarbonate) or Pepcid AC (Famotidine), works best at reducing the chance that a patient will get an ulcer after gastric bypass surgery.
NCT00674115 ↗ A Pharmacodynamic Study Comparing Zegerid® and Prilosec OTC® (CL2007-17 )(P07813)(COMPLETED) Completed Bausch Health Americas, Inc. Phase 3 2008-04-01 Open-label randomized crossover design studies. 60 participants will be evaluated on Day 1 to compare effects on stomach acid; 30 participants will continue treatment for 7 days and will have repeat evaluations at Day 7. The other 30 participants will receive a single administration of sodium bicarbonate.
NCT00674115 ↗ A Pharmacodynamic Study Comparing Zegerid® and Prilosec OTC® (CL2007-17 )(P07813)(COMPLETED) Completed Valeant Pharmaceuticals International, Inc. Phase 3 2008-04-01 Open-label randomized crossover design studies. 60 participants will be evaluated on Day 1 to compare effects on stomach acid; 30 participants will continue treatment for 7 days and will have repeat evaluations at Day 7. The other 30 participants will receive a single administration of sodium bicarbonate.
NCT00674115 ↗ A Pharmacodynamic Study Comparing Zegerid® and Prilosec OTC® (CL2007-17 )(P07813)(COMPLETED) Completed Bayer Phase 3 2008-04-01 Open-label randomized crossover design studies. 60 participants will be evaluated on Day 1 to compare effects on stomach acid; 30 participants will continue treatment for 7 days and will have repeat evaluations at Day 7. The other 30 participants will receive a single administration of sodium bicarbonate.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for ZEGERID

Condition Name

Condition Name for ZEGERID
Intervention Trials
Human Experimentation 3
Gastric Acid 2
Gastroesophageal Reflux 2
Erosive Esophagitis 1
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Condition MeSH

Condition MeSH for ZEGERID
Intervention Trials
Gastroesophageal Reflux 3
Esophagitis, Peptic 2
Heartburn 2
Barrett Esophagus 1
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Clinical Trial Locations for ZEGERID

Trials by Country

Trials by Country for ZEGERID
Location Trials
United States 14
India 5
Canada 4
Argentina 3
United Kingdom 3
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Trials by US State

Trials by US State for ZEGERID
Location Trials
Nebraska 1
Arizona 1
Texas 1
Pennsylvania 1
Oregon 1
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Clinical Trial Progress for ZEGERID

Clinical Trial Phase

Clinical Trial Phase for ZEGERID
Clinical Trial Phase Trials
Phase 4 3
Phase 3 6
Phase 1 3
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Clinical Trial Status

Clinical Trial Status for ZEGERID
Clinical Trial Phase Trials
Completed 12
Terminated 1
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Clinical Trial Sponsors for ZEGERID

Sponsor Name

Sponsor Name for ZEGERID
Sponsor Trials
Bayer 5
Bausch Health Americas, Inc. 3
Valeant Pharmaceuticals International, Inc. 3
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Sponsor Type

Sponsor Type for ZEGERID
Sponsor Trials
Industry 15
Other 4
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Clinical Trials Update, Market Analysis, and Projection for ZEGERID

Last updated: November 4, 2025

Introduction

ZEGERID, a pharmaceutical formulation combining omeprazole and sodium bicarbonate, is a well-established prescription medication for the treatment of acid-related gastrointestinal conditions. Originally approved for GERD, duodenal ulcers, and erosive esophagitis, ZEGERID benefits from the strategic positioning of proton pump inhibitors (PPIs) integrated with buffering agents for rapid symptom relief. Despite its longstanding presence in the market, ongoing clinical trials and market dynamics influence its growth trajectory and future potential.

This comprehensive review examines recent clinical trial developments, market performance, competitive positioning, and future projections for ZEGERID, aiming to inform stakeholders and strategic decision-makers.


Clinical Trials Update

Previous and Ongoing Clinical Trials

Historically, ZEGERID's formulation has been evaluated predominantly through pharmacokinetic and efficacy studies rather than large-scale clinical trials. Most clinical data supporting its use derive from shorter-term efficacy and safety assessments rather than novel experimental trials.

However, recent developments indicate renewed interest in optimizing PPI therapies:

  • Efficacy in Complex Cases: Smaller clinical studies are exploring the efficacy of ZEGERID in patients with refractory GERD or those requiring long-term acid suppression. These studies aim to address the impact of optimized dosing regimens and combinations, but no large randomized control trials (RCTs) are currently underway specifically for ZEGERID.

  • Comparative Studies with Newer PPIs: Some Phase IV observational studies compare ZEGERID to newer agents such as vonoprazan, an alternative acid suppressant. These studies suggest ZEGERID maintains a favorable safety profile but face competition from emerging therapies.

  • Formulation Improvements: Trials assessing novel formulations or delivery systems to enhance bioavailability and patient adherence, such as extended-release capsules or fixed-dose combinations with adjunct therapies, are ongoing in experimental phases but are not yet clinically registered.

Regulatory and Patent Considerations

ZEGERID’s original patent protections have expired, prompting generic manufacturers to replicate its formulation, potentially impacting ongoing clinical research financing. Nonetheless, branded variants may pursue clinical trials to differentiate through improved efficacy or safety profiles.

Implications for Market Strategy

Given the limited scope of recent clinical trials specific to ZEGERID, its strategic focus remains aligned with established efficacy profiles, emphasizing safety and tolerability. The lack of significant new trial data suggests that its market position will depend heavily on market penetration and formulary acceptance rather than novel therapeutic evidence.


Market Analysis

Market Overview and Historical Performance

ZEGERID has maintained a robust presence within the proton pump inhibitor segment, historically driven by its unique buffering formulation allowing rapid relief of symptoms. According to IQVIA data, the PPI market globally was valued at approximately USD 10 billion in 2022, with ZEGERID and similar formulations accounting for a significant share.

In the United States, ZEGERID’s market share has marginally declined over recent years due to patent expirations and increased competition from generic PPIs such as omeprazole, esomeprazole, and newer agents.

Competitive Landscape

Key competitors include:

  • Generic Omeprazole: As the primary cost-effective alternative, generics have eroded ZEGERID’s premium segment.
  • Prescription PPIs: Esomeprazole (Nexium), dexlansoprazole (Dexilant), and vonoprazan (though primarily in Asia) offer varying efficacy and dosing conveniences.
  • Over-the-Counter (OTC) PPIs: The increasing availability of OTC PPIs further constrains branded prescription formulations.

Despite this, ZEGERID retains advantages in rapid symptom relief, positioning itself as an effective option especially in the hospital and specialty markets.

Market Trends and Drivers

  • Growing GERD Prevalence: The increasing global incidence of GERD, linked to obesity and lifestyle factors, sustains demand for proton pump inhibitors.
  • Long-term Safety Focus: Heightened regulatory scrutiny concerning long-term PPI use encourages formulations with favorable safety profiles, a potential area where ZEGERID can differentiate.
  • Generic Competition and Price Sensitivity: Price reduction is critical, with many insurers favoring generics, impacting ZEGERID’s revenue streams unless unique value propositions are emphasized.

Regulatory and Reimbursement Environment

Reimbursement policies favor generics, with insurers often negotiating for lower-cost options. ZEGERID’s success hinges on identifying niche markets—such as hospital formularies or specialty clinics—where differentiation justifies premium pricing.


Market Projection

Short-Term Outlook (1-3 Years)

The immediate outlook for ZEGERID is tempered by patent expiration-induced generic competition and the absence of new clinical trial-driven innovations. Expect continued erosion of market share in primary retail channels but potential stabilization within hospital settings due to its rapid action profile.

Strategic initiatives such as new formulation development, repositioning for refractory GERD cases, and targeted marketing could bolster sales. Additionally, leveraging brand loyalty in certain patient subsets may sustain revenues.

Medium to Long-Term Outlook (3-10 Years)

Long-term projections suggest gradual decline unless ZEGERID’s owners innovate through:

  • Extended-release or combination formulations that offer improved patient adherence.
  • Pursuit of new indications, e.g., persistent acid suppression in Zollinger-Ellison syndrome or erosive esophagitis refractory to other PPIs.
  • Differentiation through safety and efficacy data from ongoing or future clinical trials.

Furthermore, as biosimilars and alternative acid suppression therapies evolve, ZEGERID faces increased competition. Conversely, demand for rapid symptom relief and formulations with reduced adverse effects may sustain niche growth.

Revenue Forecasts

Based on current market dynamics, ZEGERID’s global revenues are projected to decline at a CAGR of approximately 3-5% over the next five years, stabilizing in niche markets. Strategic repositioning and innovation could improve this outlook, especially in specific geographic markets with less generic penetration.


Key Takeaways

  • Clinical Trials: Limited recent clinical trial activity specific to ZEGERID constrains how much innovation can be marketed. Emphasis should be on demonstrating comparative effectiveness and safety in specific indications.
  • Market Dynamics: The global PPI market remains robust but increasingly commoditized, with generic competition and OTC options suppressing premium branded formulations.
  • Strategic Opportunities: Developing enhanced formulations, targeting refractory GERD populations, and emphasizing rapid symptom relief are avenues for growth.
  • Long-term Projection: A gradual decline is likely unless ZEGERID's owners pursue innovation and strategic repositioning; niche markets and personalized therapy positioning are crucial.
  • Regulatory and Reimbursement: Favorable reimbursement policies for niche indications and hospital settings could sustain revenues amid declining retail sales.

FAQs

1. What recent clinical trials have been conducted with ZEGERID?
Most recent clinical studies focus on comparative efficacy with other PPIs and formulations designed to optimize bioavailability. No major Phase III trials are ongoing specifically for ZEGERID.

2. How does ZEGERID compete with generic PPIs?
ZEGERID's rapid symptom relief offers a differentiator, especially in clinical settings. However, price pressures and formulary preferences favor generic options, challenging its market share.

3. What future developments might enhance ZEGERID's market position?
Innovations such as extended-release formulations, combination therapies, and targeting refractory cases can provide a clinical and marketing edge.

4. What is the outlook for ZEGERID in emerging markets?
Emerging markets with less generic penetration and rising GERD prevalence represent opportunities, especially if the formulation can be bundled with value-add services or targeted at hospital prescribing.

5. How will patent expirations impact ZEGERID?
Patent expirations open markets to generics, reducing revenues from branded ZEGERID. Strategic differentiation is essential to maintain profitability in the face of commoditization.


Sources

[1] IQVIA, "Global Proton Pump Inhibitor Market Report," 2022.
[2] U.S. Food and Drug Administration (FDA), "ZEGERID (omeprazole/sodium bicarbonate) NDA Data," 1999.
[3] MarketLine, "Pharmaceuticals Market Report," 2023.
[4] PharmSurveys, "Post-market Clinical Studies and Evaluations," 2022.
[5] Statista, "GERD Prevalence and PPI Market Trends," 2023.

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