Last Updated: June 25, 2026

CLINICAL TRIALS PROFILE FOR ZEGERID OTC


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505(b)(2) Clinical Trials for ZEGERID OTC

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 OTC

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.
NCT00693225 ↗ Impact of Timing on the Efficacy of Zegerid 40 mg in Healing Reflux Esophagitis: A Pilot Study Completed Bausch Health Americas, Inc. Phase 4 2008-01-01 The purpose of this study was to determine the effect of morning versus bedtime administration of omeprazole/sodium bicarbonate (Zegerid) on endoscopic healing for patients with moderate or severe reflux esophagitis. Our hypothesis was that bedtime administration of Zegerid would be superior in healing esophagitis compared to morning administration prior to a meal.
NCT00693225 ↗ Impact of Timing on the Efficacy of Zegerid 40 mg in Healing Reflux Esophagitis: A Pilot Study Completed Valeant Pharmaceuticals International, Inc. Phase 4 2008-01-01 The purpose of this study was to determine the effect of morning versus bedtime administration of omeprazole/sodium bicarbonate (Zegerid) on endoscopic healing for patients with moderate or severe reflux esophagitis. Our hypothesis was that bedtime administration of Zegerid would be superior in healing esophagitis compared to morning administration prior to a meal.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for ZEGERID OTC

Condition Name

Condition Name for ZEGERID OTC
Intervention Trials
Human Experimentation 3
Gastroesophageal Reflux 2
Gastric Acid 2
Healthy Volunteers 1
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Condition MeSH

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

Trials by Country

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

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

Clinical Trial Phase

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

Sponsor Name

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

Sponsor Type for ZEGERID OTC
Sponsor Trials
Industry 15
Other 4
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Zegerid OTC (omeprazole/sodium bicarbonate) clinical trials update, market analysis, and 2030 projection

Last updated: May 21, 2026

Zegerid OTC is an over-the-counter omeprazole product (omeprazole with sodium bicarbonate) used for frequent heartburn and acid-related indications. No patent-driven exclusivity cliff is determinative in the way it is for prescription launches because the active ingredient class (omeprazole) and multiple OTC pathways already have broad generic and authorized availability. Market trajectory is driven primarily by OTC category share, label expansions (where applicable), formulary presence at retailers, and promotional intensity, not by near-term new clinical readouts.

Key takeaways

  • Clinical development: there is no current, late-stage “registration-enabling” Zegerid OTC-specific clinical program that can be mapped to a foreseeable NDA/BLA milestone; OTC labeling typically updates through existing evidence and postmarketing support rather than stand-alone pivotal trials.
  • IP and exclusivity: the economic “future” depends less on patent expiration and more on the ongoing intensity of generic and private-label competition in OTC PPIs and sodium bicarbonate antacid combinations.
  • Market and projection: growth is modest and steady rather than step-change. The OTC PPI category expands with penetration and repeat purchase, then compresses under price competition and retailer promotions.
  • Investment focus: differentiation is largely formulation/labeling and retail execution. Risk is category commoditization if price and equivalency remain the only differentiator.

What clinical trials exist for Zegerid OTC (omeprazole/sodium bicarbonate) and what is the latest status?

Short answer: Zegerid OTC is a marketed OTC PPI combination. Public clinical “updates” for the specific OTC SKU are not typically anchored to major Phase 3 trials because the product is not a new molecular entity and OTC labeling is usually maintained via existing evidence plus routine postmarketing pharmacovigilance. The most practical “trial updates” for business planning are label-support studies, bioequivalence work for generics, and comparative performance studies versus other OTC acid-suppression options.

Are there ongoing Phase 3/registrational trials for Zegerid OTC?

No registrational late-stage trials for Zegerid OTC as a stand-alone product are identifiable as a driver of a near-term approval event. OTC products with established actives generally do not run new Phase 3 trials unless there is a material change in active composition, dosing regimen, or a new indication requiring FDA review.

What trial types are relevant to OTC PPIs like Zegerid OTC?

  1. Bioequivalence studies (generics and authorized generics) that support NDAs for omeprazole-containing OTC products.
  2. Pharmacokinetic comparisons for altered formulations or buffers (sodium bicarbonate is a meaningful formulation variable).
  3. GERD and heartburn symptom studies that support OTC labeling maintenance and positioning claims.
  4. Real-world adherence and onset-time assessments that inform marketing and patient guidance.

How do these trial dynamics affect business planning?

  • If there is no late-stage program, the near-term regulatory risk is low but competitive risk remains high.
  • Any incremental change in OTC positioning (for example, “faster relief” claims tied to onset) is usually supported by comparative studies, not a new Phase 3 endpoint program.

How strong is the patent estate for Zegerid OTC, and when does OTC exclusivity end?

Short answer: The active omeprazole ecosystem is mature, with broad generic availability. Zegerid OTC’s value is not tied to a single near-dated “Zegerid OTC-only” exclusivity expiration that would map to a predictable generic launch window.

What do patent estates usually cover for OTC omeprazole/buffer combinations?

  • Formulation patents tied to omeprazole stability with sodium bicarbonate
  • Dosage form patents (powder and packet/sachet mechanics, excipient system)
  • Manufacturing process patents (blend uniformity, humidity protection, packaging)
  • Method-of-use patents for dosing schedules (rare for OTC-only labeling, but can exist for prescription history)

Why exclusivity timing matters less than retail competition for OTC PPIs

  • Many omeprazole-containing products qualify for OTC pathways after establishing evidence of sameness and bioequivalence.
  • Retail pricing and promotional intensity determine effective market share more than patent-driven supply constraints.

Practical implication for projection

  • For 2026-2030 planning, base-case scenarios should assume continued generic and retailer private-label pressure in OTC PPIs, with incremental share gains only if the brand holds strong consumer loyalty.

What is the Orange Book status of Zegerid OTC, and what does it imply for generic entry?

Short answer: Orange Book listings for OTC omeprazole combinations typically show multiple approved NDA holders and many versions with different patent coverages. That structure implies that generic and authorized entrants can be competitively active without waiting for a single Zegerid OTC-specific expiration.

What to look for in the Orange Book for a product like Zegerid OTC

  • Whether patents are listed for the OTC NDA/ANDA route corresponding to the same formulation
  • Whether there are unexpired patents tied to formulation or method-of-use versus only packaging/secondary elements
  • Whether there are active Paragraph IV challenges that could change launch timing

Generic entry risk profile

  • High likelihood of ongoing generic competition because omeprazole is an established generic target.
  • Lower probability of a single “all-clear” moment that causes a sudden market share shift, unless a specific formulation patent or packaging patent expires for the brand.

Which companies market OTC omeprazole products that compete directly with Zegerid OTC?

Short answer: The competitive set is the broader OTC PPI category and direct “buffered omeprazole” style products where available, alongside alternative acid reducers (H2 blockers and antacids) that compete for the same consumer spend.

Competitive substitutes consumers switch to

  • OTC H2 blockers (famotidine products)
  • Antacid brands (calcium carbonate and similar fast-acting options)
  • Other OTC PPIs (omeprazole or esomeprazole equivalents depending on market availability and pricing)

Competitive substitute impact on Zegerid OTC forecasts

  • If OTC PPIs are promoted heavily during major retail cycles, they can lift category demand but also intensify share competition.
  • In price compression cycles, a branded OTC item without unique consumer value tends to underperform category growth.

What market size and growth drivers apply to Zegerid OTC and OTC PPIs overall?

Short answer: The OTC PPI market expands with consumer heartburn prevalence, repeat purchase, and retail distribution coverage. Growth slows once PPIs become widely stocked and price competition increases.

Market drivers

  • Consumer preference for PPIs for more durable acid control versus short-acting antacids
  • Retail channel reach and shelf placement
  • Promotional intensity around back-to-school, holiday travel, and seasonal heartburn increases
  • Brand trust and perceived onset for sodium bicarbonate buffered formulations

Downside drivers

  • Category commoditization: omeprazole is mature and supply is plentiful
  • Switching to lower-cost generics and private-label
  • Inventory dynamics: retailers can substitute at the shelf based on margin

How will Zegerid OTC revenue likely perform from 2025 to 2030?

Short answer: Expect low-to-mid single digit growth under an OTC category baseline, with more muted growth or share erosion in years of heavy promotional price competition.

Forecast structure (base-case framing)

  • Top line: driven by unit demand plus retail net price
  • Share: sensitive to promotional cadence and private-label penetration
  • Category: driven by OTC PPI market expansion and treatment intensity

Projection ranges (directional)

  • Units: modest growth assuming continued OTC PPI adoption
  • Net revenue: growth capped by price compression unless Zegerid OTC sustains premium positioning

Scenario bands (business-useful)

  • Base case (most likely): net revenue grows at low single digits with stable-to-slightly declining share
  • Downside case: net revenue is flat to down if private label and generic depth intensifies
  • Upside case: net revenue grows mid-single digits if the brand maintains premium and expands placement with strong seasonal campaigns

What are the commercialization levers for Zegerid OTC over the next 2–3 years?

Short answer: Retail execution and consumer-facing differentiation.

Highest-leverage levers

  • Price architecture: loyalty, coupons, and retailer-specific deals that protect premium during promotional cycles
  • Pack economics: optimizing unit counts and bundle structures to maintain acceptable shelf price perception
  • Form-factor messaging: sodium bicarbonate buffered “how it works” education to sustain perceived value versus plain omeprazole products
  • Channel expansion: maintaining or improving presence in high-turn mass and drug channels

Least-leverage levers (given the competitive baseline)

  • Stand-alone new clinical claims, unless supported by formal label updates

What generic entry risks exist for Zegerid OTC, and how do they affect pricing?

Short answer: Generic entry risk is ongoing, not event-driven. The more relevant risk is iterative increases in private-label depth and discounting rather than a single patent-triggered launch.

Pricing impact pathway

  • Increased generic depth tends to compress net prices across the category.
  • Brand premium erodes unless supported by distribution and promotion that maintain consumer pull.

Time horizon implications

  • Any single year could see short-term volume shocks due to promotions or retailer substitutions, but long-run trajectory depends on sustained consumer switching rates.

How does Zegerid OTC compare with other OTC acid reducers in consumer outcomes and market dynamics?

Short answer: PPIs generally deliver more durable symptom control than H2 blockers and antacids, which supports PPI share under typical heartburn treatment behavior. Within OTC PPIs, the differentiation is mostly perceived speed and convenience plus price.

Consumer choice dynamics

  • If consumers perceive faster onset, buffered products can defend premium pricing.
  • If price becomes the dominant decision factor, generic PPIs and private label take share.

Market dynamics across classes

  • Antacid and H2 products compete as first-line purchases.
  • PPI products compete for repeat purchases and for consumers who “graduate” from antacids.

What regulatory milestones matter for Zegerid OTC going forward?

Short answer: OTC PPI regulatory work is typically label maintenance, manufacturing updates, and postmarketing safety monitoring rather than new FDA approvals.

Milestones to monitor

  • OTC label revisions and approved supplement changes
  • Manufacturing changes that require FDA notification and potentially risk the availability cycle
  • Enforcement actions or product quality recalls that can disrupt channel supply and temporarily lift or hurt share

Key Takeaways

  • Zegerid OTC’s near-term strategic picture is not defined by new clinical trial endpoints or a single patent expiration event; it is defined by OTC PPI category competition and retail pricing execution.
  • Competitive risk remains structurally high due to omeprazole maturity and broad generic availability. Forecasts should assume ongoing price pressure and private-label growth.
  • From 2025-2030, the base case is low-to-mid single digit revenue growth at best, with upside requiring sustained brand premium and distribution strength, and downside tied to deeper discounting by competitors.

FAQs

1) Does Zegerid OTC have any FDA-approved new indication changes in the last year?
No event-driven new indication changes are the typical driver for an established OTC omeprazole product; changes usually come through label maintenance and supplement updates rather than new OTC indications.

2) Are there Paragraph IV challenges for Zegerid OTC that could drive a generic launch next?
Not in a way that maps to a near-dated, single “brand clearance” trigger for Zegerid OTC, given the mature omeprazole generic landscape.

3) What is the main competitive threat to Zegerid OTC: other PPIs or H2 blockers?
The largest direct threat is other OTC PPIs and buffered omeprazole equivalents via price and distribution, with H2 blockers and antacids acting as substitutes for initial purchase behavior.

4) How should investors model Zegerid OTC revenue risk?
Model revenue with unit growth assumptions capped by category maturity and net price compression driven by retailer promotions and private-label substitution.

5) What type of evidence would matter most for Zegerid OTC to support a premium positioning claim?
Comparative studies tied to onset or symptom control relative to other OTC acid reducers, plus any label supplement that formalizes that claim.


References

  1. FDA. Orange Book: Approved Drug Products with Therapeutic Equivalence Evaluations. U.S. Food and Drug Administration.
  2. ClinicalTrials.gov. Omeprazole and omeprazole/sodium bicarbonate studies query results. U.S. National Library of Medicine.

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