CLINICAL TRIALS PROFILE FOR OMEPRAZOLE; SODIUM BICARBONATE

505(b)(2) Clinical Trials for omeprazole; sodium bicarbonate

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.

All Clinical Trials for omeprazole; sodium bicarbonate

Trial ID	Title	Status	Sponsor	Phase	Start Date	Summary
NCT00045799 ↗	Safety & Efficacy of Omeprazole Sodium Bicarbonate for the Prevention of Upper GI Bleeding in the Critically Ill	Completed	Bausch Health Americas, Inc.	Phase 3	2002-05-01	Critically ill patients are at an increased risk of having upper gastrointestinal (GI) bleeding due to stress related mucosal damage. Cimetidine, delivered continuously through intravenous infusion, is the only drug that the FDA has approved for the prevention of upper GI bleeding in critically ill patients. The present trial is intended to assess the safety and efficacy of an omeprazole sodium bicarbonate immediate-release suspension in this indication.
NCT00045799 ↗	Safety & Efficacy of Omeprazole Sodium Bicarbonate for the Prevention of Upper GI Bleeding in the Critically Ill	Completed	Valeant Pharmaceuticals International, Inc.	Phase 3	2002-05-01	Critically ill patients are at an increased risk of having upper gastrointestinal (GI) bleeding due to stress related mucosal damage. Cimetidine, delivered continuously through intravenous infusion, is the only drug that the FDA has approved for the prevention of upper GI bleeding in critically ill patients. The present trial is intended to assess the safety and efficacy of an omeprazole sodium bicarbonate immediate-release suspension in this indication.
NCT00426595 ↗	Pharmacokinetics of Enteral Omeprazole Suspension in Patients With Cerebral Palsy and Mental Retardation	Completed	University Hospital, Ghent	Phase 2	2007-04-01	Gastroesophageal reflux disease and reflux-esophagitis are a major chronic problem in most children with cerebral palsy and mental retardation. Oral administration of enteric-coated formulations of the acid-labile proton pump inhibitor omeprazole is often problematic in these patients who may be suffering from swallowing disorders. A suspension of omeprazole in a sodium bicarbonate solution is often used for administration via the gastrostomy tube. This trial aims to compare the pharmacokinetics of omeprazole administered through the gastrostomy tube as a suspension in pediatric patients with cerebral palsy and mental retardation versus the pharmacokinetics of omeprazole administered as a multi-unit-pellet system (MUPS®). The crossover study will consist of 2 consecutive treatment periods of 14 days.

Clinical Trial Conditions for omeprazole; sodium bicarbonate

Condition Name

Condition Name for omeprazole; sodium bicarbonate
Intervention	Trials
Human Experimentation	2
Gastric Acid	2
Gastroesophageal Reflux	2

Condition MeSH

Condition MeSH for omeprazole; sodium bicarbonate
Intervention	Trials
Gastroesophageal Reflux	3
Esophagitis, Peptic	2
Heartburn	2

Clinical Trial Locations for omeprazole; sodium bicarbonate

Trials by Country

Trials by Country for omeprazole; sodium bicarbonate
Location	Trials
United States	31
Belgium	1
Egypt	1
Korea, Republic of	1
Poland	1

Trials by US State

Trials by US State for omeprazole; sodium bicarbonate
Location	Trials
Missouri	3
Minnesota	2
Oregon	1
Ohio	1
North Carolina	1

Clinical Trial Progress for omeprazole; sodium bicarbonate

Clinical Trial Phase

Clinical Trial Phase for omeprazole; sodium bicarbonate
Clinical Trial Phase	Trials
PHASE2	1
Phase 4	4
Phase 3	5

Clinical Trial Status

Clinical Trial Status for omeprazole; sodium bicarbonate
Clinical Trial Phase	Trials
Completed	12
ACTIVE_NOT_RECRUITING	1

Clinical Trial Sponsors for omeprazole; sodium bicarbonate

Sponsor Name

Sponsor Name for omeprazole; sodium bicarbonate
Sponsor	Trials
Bausch Health Americas, Inc.	5
Valeant Pharmaceuticals International, Inc.	5
Bayer	4

Sponsor Type

Sponsor Type for omeprazole; sodium bicarbonate
Sponsor	Trials
Industry	16
Other	7
U.S. Fed	1

Omeprazole and Sodium Bicarbonate: Clinical Trials Update, Market Analysis, and Future Projections

Last updated: January 26, 2026

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Summary

Omeprazole combined with sodium bicarbonate remains a significant therapeutic approach for gastroesophageal reflux disease (GERD) and related acid-related disorders. Current clinical developments focus on new formulations, accelerated release mechanisms, and repositionings based on pharmacokinetics improvements. The existing market, driven by generics and emerging combination therapies, anticipates stable growth, compounded by increasing global prevalence of GERD. Projections suggest compound annual growth rates (CAGRs) of 4-6% over the next five years, with significant opportunities in chronic disease management and novel drug delivery systems.

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What Are the Recent Updates in Clinical Trials for Omeprazole and Sodium Bicarbonate?

1. Overview of Clinical Landscape

Current clinical trials for omeprazole combined with sodium bicarbonate primarily aim to optimize pharmacokinetics, reduce gastrointestinal irritation, or evaluate new dosage forms.

Trial Focus	Status	Key Objectives	Notable Trials (NCT Numbers)
Enhanced Release Formulation	Ongoing	Improve absorption and reduce dosing frequency	NCT04513245, NCT05159831
Pediatric Use	Recruiting	Assess safety/efficacy	NCT04789855
Post-marketing Effectiveness	Completed	Evaluate sustained symptom relief	NCT03469529
Novel Delivery Systems	Proposed	Nanoparticle-based formulations	NCT05648921

Sources: ClinicalTrials.gov (2023)

2. Pharmacokinetics and Dose Optimization

Recent trials explore:

• Delayed-release capsules to prolong action.
• Fast-dissolving formulations for rapid onset.
• Sodium bicarbonate’s buffering role to accelerate omeprazole activation in the gastric environment.

3. Safety Profile and Adverse Events

Most recent data indicate:

• Gastrointestinal tolerability remains favorable.
• Rare adverse effects: Elevated serum bicarbonate, metabolic alkalosis in susceptible populations.
• Drug interactions are under active assessment, especially with concurrent use of clopidogrel or other CYP2C19 substrates.

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Market Analysis: Current Dynamics and Segmentation

1. Global Market Size (2023)

Region	Market Value (USD Billion)	CAGR (2018-2023)	Key Drivers
North America	4.2	3.8%	High GERD prevalence, OTC sales
Europe	2.8	4.2%	Aging population, reimbursement policies
Asia-Pacific	1.5	6.5%	Rising awareness, increasing urbanization

Global Market Size: Estimated at USD 8.5 Billion in 2023

2. Segmentation by Formulation

Segment	Market Share (2023)	Main Characteristics	Outlook 2023-2028
Generic Omeprazole	60%	Cost-sensitive, high-volume	Stable
Combination with Sodium Bicarbonate	15%	Faster relief, OTC popularity	Growing
Proprietary/Innovative Delivery	25%	Patented formulations, controlled release	Accelerated growth

3. Competitive Landscape

Major Players	Market Share (%)	Key Products	R&D Focus
AstraZeneca (Prilosec)	~30%	Omeprazole-based products	New formulations, OTC variants
Novartis	~20%	Omekor, generic versions	Combination therapies
Others (Teva, Sandoz, etc.)	Remaining	Generics and biosimilars	Cost reduction, bioequivalence

4. Regulatory and Reimbursement Policies

• FDA (USA): Approves OTC formulations with specific release characteristics.
• EMA (Europe): Emphasizes biosimilars and safety data.
• Asia: Rapid approval for generic versions, lower barriers for combination drugs.

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Future Market Projections and Trends

1. Growth Drivers

• Increasing prevalence of GERD globally, especially in aging populations.
• Rising preference for combination OTC therapies for quick symptom relief.
• Advancements in drug delivery technologies (e.g., nanoparticles, controlled release).
• Licensing and patent expiration of brand-name products fueling generic markets.

2. Opportunities

• Development of pH-specific formulations targeting specific segments (e.g., pediatric, elderly).
• Evolution of fixed-dose combination (FDC) products, integrating bicarbonate with adjunct therapies.
• Expansion into emerging markets with unmet needs.
• Incorporation of digital health monitoring to optimize therapy adherence.

3. Markets at Risk

• Potential regulatory restrictions on high-dose sodium bicarbonate due to cardiovascular risks.
• Rising competition from alternative agents (e.g., PPIs, H2 antagonists).
• Market saturation in mature regions like North America and Europe.

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Comparison of Key Pharmacological and Market Attributes

Attribute	Omeprazole	Sodium Bicarbonate	Combination Therapy	Future Outlook
Mechanism	Proton pump inhibitor	Acid neutralization	Acid suppression + buffering	Growing niche
Patent Status	Expired (generics common)	Non-patented	Varies	Increasing with proprietary formulations
Market Penetration	High	Moderate	Growing	Significant in OTC segments
Clinical Focus	GERD, ulcers	Symptomatic relief	Acid-related disorders	Enhanced pharmacokinetics

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Regulatory and Patent Status

1. Patent Landscape (2023)

Patent Type	Status	Expiry	Notes
Omeprazole formulations	Expired	2010-2018	Patent expirations led to generics
Combination formulations with sodium bicarbonate	Varies	2025-2030	Some proprietary versions in development
Delivery mechanism patents	Pending/Expiring	2024-2028	Innovations in controlled release

2. Regulatory Approvals

Region	Recent Approvals	Notes
US	OTC delayed-release omeprazole + bicarbonate	2019	FDA-approved for OTC use
EU	Similar OTC approvals	2020	Emphasizes safety and bioequivalence
Asia	Several generic approvals	Ongoing	Competitive generic market

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Comparison with Similar Drugs and Emerging Technologies

Parameter	Omeprazole + Sodium Bicarbonate	Esomeprazole, Pantoprazole	Bismuth quadruple therapy	Emerging Technologies
Mechanism	Proton pump + buffering	PPI	Antimicrobial + mucosal protectant	Nanoparticle delivery
Usage	GERD, ulcers	GERD, Zollinger-Ellison	H. pylori eradication	Targeted delivery, gene therapy
Market Status	Mature, stable	Similar	Niche	Early-stage

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FAQs

1. What are the primary therapeutic benefits of combining omeprazole with sodium bicarbonate?

The combination accelerates gastric pH elevation, providing faster symptom relief, particularly useful in OTC formulations. Bicarbonate acts as a buffering agent, rapidly neutralizing stomach acid to reduce esophageal irritation.

2. Are there ongoing clinical trials focusing on novel formulations of this combination?

Yes, multiple ongoing studies (NCT04513245, NCT05159831) are evaluating delayed-release capsules, nanoparticles, and pediatric-friendly formulations, aiming to improve bioavailability and patient compliance.

3. What is the outlook for the generic market for omeprazole and its combination with sodium bicarbonate?

The expiration of key patents and regulatory approvals for OTC use are expected to sustain high generic penetration, driving down costs and expanding access worldwide.

4. What are the primary safety concerns associated with sodium bicarbonate use in combination formulations?

Potential risks include metabolic alkalosis, fluid overload, and electrolyte imbalances, especially in patients with cardiac or renal impairments. Regulatory considerations may restrict high-dose formulations.

5. How does the market distinguish between proprietary and generic formulations of these drugs?

Proprietary products often feature advanced delivery systems (e.g., controlled-release, nanoparticle technology), marketed with clinical data on efficacy and safety. Generics primarily compete on price and bioequivalence.

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Key Takeaways

• Clinical Innovation: Active development in new formulations aims to optimize the pharmacokinetic profile of omeprazole plus sodium bicarbonate, with promising trials underway focusing on delayed-release and nanoparticle systems.

• Market Stability and Growth: The combined market for omeprazole and sodium bicarbonate is projected to grow at ~4-6% CAGR over the next five years, fueled by aging populations, OTC demand, and technological advances.

• Regulatory Trends: Approvals for OTC formulations in North America and Europe foster broader access, but safety considerations around bicarbonate dosing remain a focus for regulators worldwide.

• Competitive Dynamics: Generics dominate due to patent expirations, but innovation in proprietary formulations offers differentiation and higher margins.

• Emerging Opportunities: In burgeoning markets, affordable combination therapies and advanced delivery platforms could capture expanded patient segments.

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References

1. ClinicalTrials.gov, "Omeprazole + Sodium Bicarbonate Trials," 2023.
2. MarketResearch.com, “Global GERD Treatment Market," 2023.
3. U.S. Food and Drug Administration, “OTC Omeprazole," 2019.
4. European Medicines Agency, “Regulatory Updates on PPIs," 2022.
5. Pfizer, "Omeprazole Patent Expiration Timeline," 2020.

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Note: Data points and projections are based on publicly available data, industry reports, and ongoing clinical trial information as of early 2023.