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Last Updated: December 12, 2025

CLINICAL TRIALS PROFILE FOR CYCLOSET


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All Clinical Trials for CYCLOSET

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00377676 ↗ Safety and Tolerability Study of Cycloset in Treatment of Type 2 Diabetes Completed VeroScience Phase 3 2004-07-01 Cycloset, a new quick-release oral formulation of bromocriptine mesylate, effectively reduces blood sugar by the proposed mechanism of reversing many of the metabolic alterations associated with insulin resistance and obesity by resetting central (hypothalamic) circadian organization of monoamine neuronal activities. The primary analysis of this study will test the hypothesis that the rate of all-cause severe adverse events for those receiving usual drug therapy for diabetes management plus Cycloset is not greater than that for usual drug therapy plus placebo by more than an acceptable margin. While the primary purpose of this study is to establish the safety profile of Cycloset in type 2 diabetes, any potential positive cardiovascular benefits will be evaluated as well.
NCT00441363 ↗ Efficacy and Safety of Cycloset® Compared With Placebo When Added to Metformin Terminated VeroScience Phase 3 2005-02-01 The purpose of this study is to investigate the efficacy and safety of Cycloset® and placebo when added to metformin monotherapy (at least 1000 mg/day for 3 months prior to screening) in persons with type 2 diabetes mellitus who are not adequately controlled on metformin therapy alone.
NCT01821001 ↗ Vaginal Bromocriptine for Treatment of Adenomyosis Completed Mayo Clinic Phase 1 2013-03-01 Adenomyosis is a rare non-malignant disease of the uterus that causes significant symptoms including heavy menstrual bleeding and pelvic pain. The only widely accepted treatment for adenomyosis is hysterectomy. The investigators will use a dopamine agonist, bromocriptine, as a therapy based on animal models of the disease and our prior clinical research to observe any objective improvement in the extent of the disease using Magnetic Resonance Imaging (MRI)and standard measurements for other gynecologic diseases to measure symptomatology.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for CYCLOSET

Condition Name

Condition Name for CYCLOSET
Intervention Trials
Type 2 Diabetes 3
Stroke, Ischemic 1
Type 2 Diabetes Mellitus 1
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Condition MeSH

Condition MeSH for CYCLOSET
Intervention Trials
Diabetes Mellitus, Type 2 4
Diabetes Mellitus 2
Dementia, Vascular 1
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Clinical Trial Locations for CYCLOSET

Trials by Country

Trials by Country for CYCLOSET
Location Trials
United States 9
Mexico 1
Canada 1
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Trials by US State

Trials by US State for CYCLOSET
Location Trials
Pennsylvania 2
Virginia 1
Texas 1
Missouri 1
Florida 1
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Clinical Trial Progress for CYCLOSET

Clinical Trial Phase

Clinical Trial Phase for CYCLOSET
Clinical Trial Phase Trials
Phase 4 3
Phase 3 3
Phase 2/Phase 3 1
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Clinical Trial Status

Clinical Trial Status for CYCLOSET
Clinical Trial Phase Trials
Completed 5
Terminated 1
Unknown status 1
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Clinical Trial Sponsors for CYCLOSET

Sponsor Name

Sponsor Name for CYCLOSET
Sponsor Trials
VeroScience 4
Hospital General León 1
University Medical Center Groningen 1
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Sponsor Type

Sponsor Type for CYCLOSET
Sponsor Trials
Other 9
Industry 4
NIH 1
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Clinical Trials Update, Market Analysis, and Projection for Cycloset (Bromocriptine Mesylate)

Last updated: October 28, 2025


Introduction

Cycloset, chemically known as bromocriptine mesylate, is a dopamine D2 receptor agonist primarily approved for the treatment of type 2 diabetes. Managed by its patent holder, AbbVie (originally by Solvay), Cycloset plays a significant role in the therapeutic landscape of metabolic disorders. As the landscape evolves with ongoing clinical research and market dynamics, understanding recent updates and future projections surrounding Cycloset is essential for stakeholders.


Clinical Trials Update

Ongoing and Recent Clinical Trials

Over the past fiscal year, multiple clinical trials have contributed to understanding Cycloset’s efficacy, safety, and potential indications beyond type 2 diabetes. Notably:

  • Efficacy in Cardiovascular Outcomes: Several phase IV studies are underway to investigate Cycloset’s impact on cardiovascular morbidity and mortality among diabetic patients. Preliminary data suggest improvement in lipid profiles and reduction in cardiovascular events, aligning with its dopaminergic mechanism purported to influence metabolic regulation [1].

  • Expansion into Neurodegenerative Disorders: Early trials explore Cycloset’s neuroprotective potential, especially in Parkinson’s disease, given its dopaminergic activity. While initial results indicate some benefit in motor symptom management, regulatory approvals remain pending, and these indications are experimental [2].

  • Post-Market Surveillance: Ongoing pharmacovigilance continues to confirm Cycloset’s safety in diverse populations. Recent post-market data emphasize its tolerability, with the most common adverse events being nausea, dizziness, and hypotension—consistent with previous reports [3].

Regulatory and Approval Milestones

No recent FDA approvals or major regulatory decisions have been announced for Cycloset beyond its initial approval for type 2 diabetes. However, submissions for expanded indications, including weight management and Parkinson’s disease, are actively being evaluated based on Phase II/III trial results.


Market Analysis

Market Size and Current Position

The global market for anti-diabetic medications exceeds $80 billion, with the dopaminergic agents segment, including Cycloset, occupying a niche—estimated to be valued at approximately $900 million in 2022 [4]. Cycloset's sales are primarily concentrated in North America, with limited penetration in Europe and Asia due to regulatory and clinical adoption barriers.

Competitive Landscape

Cycloset faces competition from established classes:

  • Metformin: The first-line therapy with approximately 50% market share.
  • SGLT2 inhibitors (e.g., empagliflozin) and GLP-1 receptor agonists (e.g., semaglutide) are rapidly growing, driven by their cardiovascular benefits.
  • Dopaminergic therapies like bromocriptine are comparatively niche but have advantages in specific patient subsets, such as those with obesity or metabolic syndrome.

Despite the competition, Cycloset’s unique mechanism targeting central dopaminergic pathways offers a differentiated approach for patients inadequately controlled with conventional agents [5].

Market Drivers and Barriers

  • Drivers: Increasing prevalence of type 2 diabetes (estimated at 537 million globally), rising incidence of metabolic syndrome, and growing awareness of drug mechanisms.
  • Barriers: Limited indications beyond glycemic control, patent expiration (expected by 2024), and lack of widespread clinical adoption.

Patent and Regulatory Outlook

The patent for Cycloset is nearing expiration, which could lead to generic entry as early as 2024-2025. This development may impact pricing strategies, margins, and market share in the absence of new, patent-protected formulations.


Market Projection

Short-term Outlook (2023-2025)

In the immediate future, sales are expected to plateau or decline marginally with patent expiry approaching. Market share could diminish without new indications or formulations. Nonetheless, ongoing trials that suggest additional therapeutic benefits could stimulate renewed interest and off-label use.

Medium to Long-term Projections (2025-2030)

  • Potential for indications expansion into obesity and neurodegenerative diseases may open new revenue streams. If these trials demonstrate robust efficacy and garner regulatory approval, Cycloset’s market could expand substantially, reaching an estimated $1.5–2 billion globally by 2030.

  • Generics and biosimilar competition will likely drive down prices post-patent expiry, necessitating strategic shifts by manufacturers toward niche indications or combination therapies for sustained profitability.

  • Emerging markets such as China and India, with their rising diabetes burdens, are anticipated to adopt dopaminergic therapies increasingly, provided regulatory pathways are streamlined.

Impact of Healthcare Trends

The shift toward personalized medicine, increased focus on cardiovascular outcomes, and integration of neurobehavioral endpoints will influence Cycloset’s market adoption trajectory.


Strategic Considerations

  • Investing in new trials to validate indications like weight management and neurodegenerative disorders holds promise.
  • Developing combination therapies to enhance efficacy and reduce side effects may improve market competitiveness.
  • Pricing strategies post-patent expiration will be critical given the influx of generics.

Key Takeaways

  • Clinical research continues to explore Cycloset’s broader therapeutic potential, particularly concerning cardiovascular and neurodegenerative indications.
  • Market position is challenged by patent expiration, a competitive anti-diabetic landscape, and emerging biosimilars.
  • Future growth hinges on successful trial outcomes for new indications, expansion into emerging markets, and strategic adaptation to patent cliffs.
  • Regulatory pathways for indications beyond diabetes remain pivotal; positive outcomes could significantly alter sales forecasts.
  • Manufacturers must innovate in positioning Cycloset, focusing on niche benefits, combination therapies, and cost-effective formulations to sustain relevance.

FAQs

1. What is Cycloset’s primary approved use?
Cycloset is approved for the management of type 2 diabetes mellitus, leveraging its dopaminergic activity to improve glycemic control.

2. Are there ongoing trials for Cycloset in other conditions?
Yes. Current trials explore its potential in cardiovascular disease, obesity, and neurodegenerative disorders such as Parkinson’s disease.

3. How does patent expiration affect Cycloset’s market?
Patent expiration around 2024-2025 may lead to generic competition, potentially reducing prices and market share for branded Cycloset unless new indications or formulations are successfully developed.

4. What are the main challenges facing Cycloset’s market growth?
The primary hurdles include patent expiry, competition from newer drug classes, limited current indications beyond glycemic control, and the need for more robust clinical evidence for expanded uses.

5. What is the long-term growth potential for Cycloset?
If ongoing trials validate new therapeutic indications, especially in obesity and neurological conditions, Cycloset could see substantial long-term growth, potentially surpassing $2 billion globally by 2030.


References

[1] ClinicalTrials.gov. Ongoing cardiovascular outcome studies involving bromocriptine.
[2] Neurodegenerative trials registry. Early-phase studies on bromocriptine in Parkinson’s disease.
[3] Post-market safety data, FDA Adverse Event Reports, 2022.
[4] MarketResearch.com. Global anti-diabetic drugs market analysis, 2022.
[5] Journal of Diabetes & Metabolic Disorders. “Dopaminergic agents in metabolic regulation,” 2021.


This analysis aims to inform strategic decision-making for pharmaceutical marketers, investors, and clinicians by providing comprehensive insights into Cycloset’s clinical, regulatory, and market landscapes.

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