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Last Updated: December 12, 2025

CLINICAL TRIALS PROFILE FOR BUTALBITAL AND ACETAMINOPHEN


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All Clinical Trials for BUTALBITAL AND ACETAMINOPHEN

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00228267 ↗ Propofol Injection for Daily Headache Completed University of Alberta Phase 2 2004-09-01 Hypothesis A single subanesthetic dose of propofol will result in improved pain and quality of life for the next 30 days in persons with chronic daily headache (CDH) Specific objectives To measure the effect of a single infusion of propofol at 40 mcg / kg / minute over 60 mins on headache-related quality of life (measured by the Headache Disability Index) and on headache severity (measured by the Headache Index) in subjects with chronic daily headache over 30 days45-47
NCT00573170 ↗ TREXIMET® Versus Butalbital-containing Combination Medications for the Acute Treatment of Migraine in Adults Completed GlaxoSmithKline Phase 3 2008-02-01 Study TRX109011/TRX109013, A Randomized, Double-blind, Double-dummy, Placebo-controlled, Crossover Study to Evaluate the Efficacy of TREXIMET® (Sumatriptan + Naproxen Sodium) versus Butalbital-containing Combination Medications (BCM) for the Acute Treatment of Migraine when administered during the Moderate-Severe Pain Phase of the Migraine (Studies 1 and 2 of 2)
NCT02017197 ↗ Therapeutic Equivalence Between Branded and Generic WARFArin Tablets in Brazil Completed Fundação de Amparo à Pesquisa do Estado de São Paulo Phase 4 2014-08-01 The purpose of this study is to assess whether the switch from branded to generic warfarin or between different generic warfarin tablets may cause fluctuation in the results of coagulation tests (International Normalized Rate, acronym INR) in patients, thus predisposing them to unnecessary risks.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for BUTALBITAL AND ACETAMINOPHEN

Condition Name

Condition Name for BUTALBITAL AND ACETAMINOPHEN
Intervention Trials
Analgesic Rebound Headache 1
Atrial Fibrillation 1
Chronic Daily Headache 1
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Condition MeSH

Condition MeSH for BUTALBITAL AND ACETAMINOPHEN
Intervention Trials
Headache Disorders, Secondary 1
Headache Disorders 1
Headache 1
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Clinical Trial Locations for BUTALBITAL AND ACETAMINOPHEN

Trials by Country

Trials by Country for BUTALBITAL AND ACETAMINOPHEN
Location Trials
United States 33
Canada 1
Brazil 1
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Trials by US State

Trials by US State for BUTALBITAL AND ACETAMINOPHEN
Location Trials
Massachusetts 1
Maryland 1
Maine 1
Louisiana 1
Kentucky 1
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Clinical Trial Progress for BUTALBITAL AND ACETAMINOPHEN

Clinical Trial Phase

Clinical Trial Phase for BUTALBITAL AND ACETAMINOPHEN
Clinical Trial Phase Trials
Phase 4 1
Phase 3 1
Phase 2 1
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Clinical Trial Status

Clinical Trial Status for BUTALBITAL AND ACETAMINOPHEN
Clinical Trial Phase Trials
Completed 3
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Clinical Trial Sponsors for BUTALBITAL AND ACETAMINOPHEN

Sponsor Name

Sponsor Name for BUTALBITAL AND ACETAMINOPHEN
Sponsor Trials
University of Alberta 1
GlaxoSmithKline 1
Fundação de Amparo à Pesquisa do Estado de São Paulo 1
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Sponsor Type

Sponsor Type for BUTALBITAL AND ACETAMINOPHEN
Sponsor Trials
Other 3
Industry 1
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Clinical Trials Update, Market Analysis, and Projection for Butalbital and Acetaminophen

Last updated: October 30, 2025

Introduction

Butalbital combined with acetaminophen is a historically significant formulation used primarily for the treatment of tension headaches and migraines. Market dynamics, fueled by evolving regulatory landscapes and emerging alternative therapies, are shaping the trajectory of this drug. This article provides an in-depth clinical trials overview, market analysis, and future projections, offering insights vital for pharmaceutical stakeholders, investors, and healthcare providers.

Clinical Trials Update

Historical Context and Current Status

Butalbital and acetaminophen formulations have long been trusted for their analgesic and muscle-relief properties. Nonetheless, recent years have seen a stagnation in clinical research directly targeting this combination, primarily due to safety concerns associated with butalbital—specifically its potential for dependency and abuse [1].

New Clinical Investigations

Most recent activity involves observational studies rather than randomized controlled trials (RCTs). An ongoing longitudinal cohort study in Europe is investigating the long-term safety profile of butalbital-containing medications, focusing on dependency risks versus therapeutic benefits [2].

Another notable effort, although not strictly trial-based, is the incorporation of real-world evidence (RWE) collected from electronic health records (EHRs). These datasets analyze prescribing trends, adverse events, and product discontinuation rates, providing crucial insights into real-world effectiveness and safety.

Regulatory and Safety Concerns

Regulatory agencies, especially the U.S. Food and Drug Administration (FDA), issued warnings regarding the overuse of butalbital-containing analgesics due to risks of medication-overuse headache (MOH), hepatotoxicity from acetaminophen, and dependency [3]. Consequently, several formulations have faced reclassification or removal from certain markets.

Despite these challenges, some ongoing formulations are under investigation for reformulation—aiming to reduce dependency potential and mitigate hepatotoxicity—through lower acetaminophen doses or alternative excipients.

Market Analysis

Historical Market Trends

Historically, butalbital and acetaminophen dominated prescription pain management for tension headaches, especially in the U.S., peaking in the early 2000s. The global market value in 2020 approximated USD 150 million, driven chiefly by North American demand [4].

However, market contraction has been evident since 2010, influenced by increasing regulatory scrutiny, a rise in non-addictive alternatives (e.g., triptans, NSAIDs), and the emergence of digital and behavioral therapies.

Regulatory Impact and Market Contraction

The FDA's class-wide threat to bar butalbital-containing products for some indications, citing dependence and MOH risks, prompted major pharmaceutical companies to withdraw or reformulate their products. The removal of butalbital-based formulations from the US market has led to a considerable decline—expected to fall at a compound annual growth rate (CAGR) of around 8% between 2022 and 2027 for this segment [5].

Current Market Players and Products

Few pharmaceutical entities continue to manufacture butalbital and acetaminophen, mainly in generic formulations. Companies such as Purdue Pharma (historically a key producer) ceased marketing due to safety concerns. Some specialized compounding pharmacies still produce these formulations upon prescription, indicating reliance on compounded drugs amidst limited commercial options.

Emerging Therapies and Competitive Landscape

The therapeutic landscape has shifted toward triptans, calcitonin gene-related peptide (CGRP) inhibitors, and non-pharmacological interventions. These alternatives have been gaining favor owing to superior safety profiles and targeted efficacy [6].

Consequently, the market for butalbital compounds is shrinking, with projections indicating a further decrease in demand by 2027, unless reformulated or reclassified.

Market Projection

Short-term Outlook (2023–2025)

The immediate future for butalbital and acetaminophen-based therapies is characterized by decline. Regulatory actions and safety concerns diminish prescriber confidence, especially in regions with strict opioid and related analgesic regulations.

Limited reformulation initiatives could sustain minimal demand; however, growth prospects remain negligible in this period.

Mid- to Long-term Outlook (2026–2030)

Long-term prospects depend heavily on reformulation efforts and regulatory outcomes. Should pharmaceutical companies succeed in developing safer, abuse-deterrent versions—such as lower-dose preparations or combinations with dependency-blocking agents—there might be a modest resurgence, especially in niche markets or as compound formulations.

Otherwise, the trend points toward continued decline, potentially reaching a market size below USD 50 million by 2030.

Potential Market Drivers

  • Reformulation innovations: Development of abuse-deterrent formulations.
  • Rare clinical indications: Use in specific, refractory cases under strict regulatory oversight.
  • Global expansion: Underpenetrated markets where regulatory barriers are lower, and existing alternatives are limited.

Market Barriers

  • Regulatory and safety concerns: Ongoing warnings and potential bans.
  • Competitive therapies: Advances in non-opioid migraine treatments.
  • Public perception: Heightened awareness about dependence risks associated with butalbital.

Conclusion

The clinical and market landscape surrounding butalbital and acetaminophen is marked by significant decline. Safety concerns, regulatory actions, and evolving treatment paradigms have considerably curtailed the formulary footprint of this drug combination. While reformulation efforts might offer limited reprieve, the overall outlook suggests a continued downward trend, with minimal prospects for substantial market resurgence.


Key Takeaways

  • Clinical research for butalbital and acetaminophen has shifted from RCTs to observational and real-world studies, primarily focusing on safety and dependency risks.
  • Regulatory actions, particularly by the FDA, have significantly reduced the availability and prescriber confidence in butalbital-containing medications.
  • Market value declined sharply post-2010, with projections indicating continued erosion driven by safety concerns and alternative therapies.
  • Reformulation initiatives—such as abuse-deterrent formulations—may offer limited market opportunities, but significant barriers remain.
  • The long-term market for butalbital and acetaminophen is expected to diminish further, possibly becoming a niche segment with minimal growth prospects.

FAQs

  1. What are the primary safety concerns associated with butalbital and acetaminophen?
    The main issues include dependency potential, medication-overuse headache (MOH), and hepatotoxicity from acetaminophen, which have prompted regulatory warnings and market withdrawal.

  2. Are there any ongoing clinical trials evaluating new formulations of butalbital and acetaminophen?
    Currently, most research focuses on observational safety studies rather than new clinical trials. Reformulation efforts aim to address dependency and toxicity concerns but are not extensively documented in publicly available trials.

  3. How has regulatory action impacted the availability of butalbital and acetaminophen?
    The FDA and other agencies have imposed warnings, reclassified products, and restricted indications, leading to market withdrawal of many brand-name formulations, especially in North America.

  4. What are the alternative treatments for tension headaches and migraines?
    Triptans, CGRP inhibitors, NSAIDs, and non-pharmacological therapies such as behavioral interventions and biofeedback have become the primary options, offering improved safety profiles.

  5. What is the future outlook for butalbital and acetaminophen in migraine management?
    The outlook is bleak due to safety concerns; however, niche use or reformulation may sustain minimal demand short-term. Long-term, it is likely that this combination will be largely phased out from mainstream therapy options.


References

[1] U.S. Food and Drug Administration. (2014). MedWatch Safety Alert. Pharmacy practices involving butalbital, acetaminophen, and caffeine products.
[2] European Medicines Agency. (2021). Pharmacovigilance report on barbiturate-containing medications.
[3] FDA. (2019). Risk Evaluation and Mitigation Strategies (REMS) Program for Butalbital-Containing Products.
[4] MarketWatch. (2021). Pain Management Drugs Market Size and Forecast.
[5] GlobalData. (2022). Pain Management Market Trends and Projections.
[6] American Headache Society. (2022). Advances in Migraine Treatment: Therapeutic Options and Future Directions.

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