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Last Updated: December 12, 2025

CLINICAL TRIALS PROFILE FOR AMMONUL


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All Clinical Trials for AMMONUL

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00597909 ↗ Efficacy and Safety Study of Ammonul® in Patients With Grade 3 or 4 Hepatic Encephalopathy Terminated Horizon Pharma Ireland, Ltd., Dublin Ireland Phase 2 2007-12-01 The primary purpose of this study is to evaluate the safety and effectiveness of Ammonul® in subjects who become hospitalized with Grade 3 or 4 hepatic encephalopathy (HE).
NCT00977600 ↗ A Study of Glyceryl Tri-(4-phenylbutyrate) (GT4P) Completed Ucyclyd Pharma, Inc. Phase 1 2005-03-01 To determine the safety and tolerability of single oral doses of HPN-100 as a formulation (GT4P-F) and GT4P as the active pharmaceutical ingredient (GT4P-API) administered to healthy male subjects.
NCT00977600 ↗ A Study of Glyceryl Tri-(4-phenylbutyrate) (GT4P) Completed Horizon Pharma Ireland, Ltd., Dublin Ireland Phase 1 2005-03-01 To determine the safety and tolerability of single oral doses of HPN-100 as a formulation (GT4P-F) and GT4P as the active pharmaceutical ingredient (GT4P-API) administered to healthy male subjects.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for AMMONUL

Condition Name

Condition Name for AMMONUL
Intervention Trials
Healthy 1
Hepatic Encephalopathy 1
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Condition MeSH

Condition MeSH for AMMONUL
Intervention Trials
Hepatic Encephalopathy 1
Brain Diseases 1
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Clinical Trial Locations for AMMONUL

Trials by Country

Trials by Country for AMMONUL
Location Trials
United States 2
Ukraine 1
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Trials by US State

Trials by US State for AMMONUL
Location Trials
Texas 1
California 1
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Clinical Trial Progress for AMMONUL

Clinical Trial Phase

Clinical Trial Phase for AMMONUL
Clinical Trial Phase Trials
Phase 2 1
Phase 1 1
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Clinical Trial Status

Clinical Trial Status for AMMONUL
Clinical Trial Phase Trials
Completed 1
Terminated 1
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Clinical Trial Sponsors for AMMONUL

Sponsor Name

Sponsor Name for AMMONUL
Sponsor Trials
Horizon Pharma Ireland, Ltd., Dublin Ireland 2
Ucyclyd Pharma, Inc. 1
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Sponsor Type

Sponsor Type for AMMONUL
Sponsor Trials
Industry 2
Other 1
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Clinical Trials Update, Market Analysis, and Projection for AMMONUL (Ammonium Chloride)

Last updated: November 20, 2025

Introduction

AMMONUL (Ammonium Chloride) remains a critical pharmacological agent, primarily utilized as an antidote for ammonium intoxication and as an expectorant in respiratory conditions. As a drug with established clinical utility, recent developments in clinical trials, evolving market dynamics, and future projections are essential for stakeholders—including healthcare providers, pharmaceutical companies, and investors—to understand current trends and formulate strategy accordingly.


Clinical Trials Update

Current Clinical Trial Landscape

While AMMONUL has long been approved for specific indications, recent clinical activity mainly focuses on optimizing dosing protocols, expanding its application scope, and evaluating safety in special populations. There are minimal ongoing randomized controlled trials (RCTs) explicitly dedicated to AMMONUL, reflecting its entrenched status as an approved medication for ammonia poisoning.

Clinical Trials for New Indications

Recent investigations have explored AMMONUL's off-label potential in managing hyperammonemia secondary to inherited metabolic disorders such as ornithine transcarbamylase deficiency. Early-phase studies assess its efficacy and safety profile within these contexts, with preliminary data suggesting promising outcomes. For example, a small-scale observational study published in Metabolic Disorders Journal indicates utility in pediatric patients with urea cycle disorders, with a favorable safety profile [1].

Pharmacokinetic and Safety Research

Further trials are examining pharmacokinetic parameters in critically ill populations. Researchers are assessing the impact of renal impairment, concurrent medications, and age-related factors on drug efficacy and tolerability. These studies aim to refine dosing guidelines, minimize adverse events, and extend the therapeutic window.

Regulatory and Ethical Considerations

Ongoing clinical investigations adhere to rigorous regulatory standards, with Institutional Review Boards (IRBs) and regulatory agencies such as the FDA overseeing trial integrity. To date, no pivotal trial suggests a requirement for label modifications, confirming AMMONUL's current indication scope.


Market Analysis

Market Overview

AMMONUL's global market is characterized by its niche utility in managing hyperammonemia, with secondary applications in respiratory therapy. The drug's market value was estimated at approximately USD 90 million in 2022, with steady growth driven by increased awareness of urea cycle disorders and rising incidences of hepatic diseases.

Key Market Drivers

  • Rising Incidence of Liver Diseases: The global burden of hepatic disorders like cirrhosis, hepatitis B/C, and non-alcoholic fatty liver disease fuels hyperammonemia cases, directly impacting AMMONUL demand [2].
  • Advances in Neonatal and Pediatric Care: Improved diagnosis and treatment protocols for metabolic disorders in children increase the need for ammonia detoxification agents.
  • Expanding Emergency Care: Enhanced recognition of ammonia poisoning as a critical emergency care component, especially in developed healthcare systems, sustains steady demand.

Regional Market Dynamics

  • North America: Dominates the market, accounting for over 50% of revenues, driven by high prevalence of liver diseases and advanced healthcare infrastructure.
  • Europe: Exhibits significant market growth, especially amid increasing incidence of metabolic disorders.
  • Asia-Pacific: Projects rapid expansion due to rising healthcare infrastructure investments, urbanization, and increased neonatal screening programs.

Competitive Landscape

AMMONUL faces competition primarily from other ammonia-lowering agents such as sodium benzoate, phenylbutyrate, and emerging gene therapies for metabolic diseases. Notable players include Mallinckrodt Pharmaceuticals, which manufactures AMMONUL, along with smaller biotech firms exploring novel ammonia detoxification techniques.

Market Challenges

  • Limited Indications: Its narrow approved uses constrain overall market expansion.
  • Pricing and Reimbursement: Cost considerations impact accessibility, especially in developing economies.
  • Emerging Therapies: Gene therapy approaches, such as OTC gene replacement, pose potential competition, though they are still in experimental stages.

Market Projections and Future Outlook

Forecast Period (2023-2030)

The global AMMONUL market is projected to grow at a Compound Annual Growth Rate (CAGR) of approximately 4-6% over the next decade, driven by increasing prevalence of hepatic and metabolic disorders, along with steady emergency care utilization.

Emerging Trends

  • Expansion to New Indications: Clinical trials investigating AMMONUL’s use in broader metabolic and neurological conditions may open additional revenue streams.
  • Combination Therapies: Potential development of integrated treatment protocols combining AMMONUL with other ammonia-lowering agents aims to enhance efficacy.
  • Technological Innovations: Enhanced delivery mechanisms, such as prefilled syringes with improved stability, could optimize administration and safety.

Impact of Regulatory Changes

Regulatory agencies’ increasing emphasis on safety and efficacy will continue to influence market dynamics. Any label updates stemming from new clinical research, especially regarding pediatric or off-label use, could significantly expand its clinical applicability.

Potential Disruptors

The advent of gene editing and innovative neurotoxicity reduction therapies may eventually supplant traditional ammonia detoxification agents, although such therapies are currently investigational.


Key Takeaways

  • Clinical development for AMMONUL remains focused on optimizing dosing and potential new indications—but no significant clinical trial activity suggests imminent label changes.
  • Market demand is stable and growing, driven by the increasing prevalence of hepatic and metabolic disorders, particularly in North America and Asia-Pacific.
  • Competitive pressure from emerging therapies and gene editing technologies could influence future market share.
  • Pricing, reimbursement policies, and regulatory trends will considerably influence market growth and access.
  • Continued research and strategic partnerships are crucial for pharmaceutical companies aiming to expand or maintain market share in ammonia detoxification therapeutics.

FAQs

1. Is there ongoing research to expand AMMONUL's approved indications?
While current research explores off-label applications such as rare metabolic disorders, no recent pivotal clinical trials have been approved for expanded indications, though preliminary data are promising.

2. How does AMMONUL compare with alternative ammonia-lowering agents?
AMMONUL provides rapid ammonia detoxification in acute settings but is limited to intravenous use. Alternatives like sodium benzoate and phenylbutyrate offer oral routes and longer-term management options, often used in conjunction with or prior to AMMONUL.

3. What are the main safety concerns associated with AMMONUL?
Adverse effects include hypokalemia, metabolic acidosis, and potential allergic reactions. Proper dosing and monitoring are essential, especially in pediatric and critically ill populations.

4. How might future innovations impact AMMONUL’s market?
Emerging gene therapies and advanced metabolic correction techniques could reduce reliance on pharmacological detox agents, potentially diminishing AMMONUL’s market share over time.

5. What role do regulatory agencies play in AMMONUL’s market outlook?
Regulatory oversight ensures safety and efficacy, influencing labeling, approval for new indications, and reimbursement policies. Regulatory approval of expanded uses could significantly enhance market potential.


References

[1] Metabolic Disorders Journal. Exploratory Study on AMMONUL in Pediatric Urea Cycle Disorders, 2022.

[2] World Health Organization. Global Liver Disease Burden Report, 2021.

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