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Last Updated: March 10, 2026

CLINICAL TRIALS PROFILE FOR ASACOL HD


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All Clinical Trials for Asacol Hd

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00007163 ↗ Monoclonal Antibody Treatment of Crohn's Disease Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 1 2000-12-01 This study will examine the safety and effectiveness of an experimental drug called J695 for treating patients with Crohn's disease-a long-term recurring inflammation of the small and large intestine. This disease is currently treated with steroids, sulfasalazine (Azulfidine), 5-ASA drugs (Pentasa, Asacol), immune suppressants, antibiotics, and an antibody against TNF-alpha. Despite the number and variety of available therapies for Crohn's disease, many patients do not respond adequately to treatment or they develop severe side effects from the medicines. Therefore, new treatments must be developed. J695 is an antibody that is identical to a human antibody but chemically changed so that it can attach to and eliminate an inflammatory chemical made by the body called interleukin-12 (IL-12). Animal studies have shown that eliminating IL-12 with an antibody can prevent inflammation in the gut and can also heal inflammation that has already developed. Patients 18 years of age and older who have had Crohn's disease for at least 4 months may be eligible for this study. Candidates will be screened with a medical history and physical examination, electrocardiogram, chest X-ray, blood and urine tests, stool analysis and possibly a review of medical records. They will complete a Crohn's Disease Activity Index Questionnaire for 7 days. Participants will be randomly assigned to one of two treatment groups, as follows: Group 1 Patients in this group will receive an injection of either J695 or placebo (a solution that does not contain any active medicine) under the skin on day 1 of the study, on day 29, and then weekly for a total of seven injections. After the last injection, patients will be followed for an additional 18 weeks. They will be monitored periodically throughout the study with physical examinations, disease activity index scores, and blood and urine tests. Group 2 Patients in group 2 will receive an injection of J695 or placebo on day 1 of the study and then weekly for a total of six injections. They will be followed for an additional 18 weeks. Patients will be monitored as described above for group 1. Participants may be asked to undergo additional tests as part of a sub-study in this protocol. These include colonoscopies to examine changes in inflammation in the gut and blood tests to analyze changes in the cells and body chemicals that affect the inflammation.
NCT00073021 ↗ Safety and Efficacy of Two Different Doses of Asacol in the Treatment of Moderately Active Ulcerative Colitis Completed Warner Chilcott Phase 3 2000-09-01 This study is a prospective clinical study to evaluate the safety and efficacy of two different doses of Asacol for the treatment of moderately active ulcerative colitis. In addition, a new tablet formulation will be evaluated at one of the two doses.
NCT00092508 ↗ CORE: A Study of OPC-6535 With Asacol® in Maintaining Ulcerative Colitis (UC) Remission Completed Otsuka Pharmaceutical Development & Commercialization, Inc. Phase 3 2004-05-01 This dose comparison study, taking place at over 200 sites worldwide, will compare the dosing, safety and efficacy of an investigational medicine OPC-6535 to the dosing, safety and efficacy of Asacol ® in the maintenance of remission in subjects with ulcerative colitis.
NCT00094458 ↗ Trial Comparing Infliximab and Infliximab and Azathioprine in the Treatment of Patients With Crohn's Disease na�ve to Both Immunomodulators and Biologic Therapy (Study of Biologic and Immunomodulator Naive Patients in Chrohn's Disease: SONIC Completed Schering-Plough Phase 3 2005-03-01 The purpose of this study is to assess the safety and effectiveness of three different treatments for patients with Crohns disease who have not responded to previous treatment with a group of drugs commonly used to treat Crohn's Disease (5-ASA) and corticosteroids. Patients will receive either infliximab (a drug used to treat autoimmune diseases) or azathioprine (an immunosuppressant or drug used to suppress the immune system) or a combination of both for up to 34 weeks. This research study will involve approximately 500 patients. The main study involves up to 34 weeks (approximately 8 months). A study extension of an additional 20 weeks (approximately 5 months) is optional for patients who successfully complete the main study. A country-specific study extension of open label infliximab treatment for an additional 1 year is optional for patients who successfully complete the main study extension.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for Asacol Hd

Condition Name

Condition Name for Asacol Hd
Intervention Trials
Ulcerative Colitis 19
Colitis, Ulcerative 5
Crohn Disease 2
Inflammatory Bowel Disease 1
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Condition MeSH

Condition MeSH for Asacol Hd
Intervention Trials
Colitis, Ulcerative 27
Ulcer 26
Colitis 26
Crohn Disease 3
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Clinical Trial Locations for Asacol Hd

Trials by Country

Trials by Country for Asacol Hd
Location Trials
United States 333
Canada 37
Germany 9
India 9
Belgium 5
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Trials by US State

Trials by US State for Asacol Hd
Location Trials
Florida 15
New York 14
Texas 14
New Jersey 13
California 13
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Clinical Trial Progress for Asacol Hd

Clinical Trial Phase

Clinical Trial Phase for Asacol Hd
Clinical Trial Phase Trials
Phase 4 3
Phase 3 20
Phase 2 5
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Clinical Trial Status

Clinical Trial Status for Asacol Hd
Clinical Trial Phase Trials
Completed 27
Terminated 4
Recruiting 2
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Clinical Trial Sponsors for Asacol Hd

Sponsor Name

Sponsor Name for Asacol Hd
Sponsor Trials
Warner Chilcott 9
Tillotts Pharma AG 6
Procter and Gamble 4
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Sponsor Type

Sponsor Type for Asacol Hd
Sponsor Trials
Industry 35
Other 23
NIH 1
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Clinical Trials Update, Market Analysis, and Projection for ASACOL HD

Last updated: February 1, 2026

Summary

ASACOL HD (mesalamine extended-release granules) is a prescription medication indicated for the treatment of moderate to severe ulcerative colitis. As of 2023, it remains a key asset within inflammatory bowel disease (IBD) therapeutics. This report reviews recent clinical trial developments, explores current market dynamics, and projects future growth trajectories based on updated data and evolving therapeutic landscapes.


What Are the Current Clinical Trials and Updates for ASACOL HD?

Recent Clinical Trial Highlights

Trial ID Phase Objective Status Key Outcomes Sponsor
NCT04561271 Phase III Efficacy and safety in ulcerative colitis Completed Demonstrated significant remission rates vs placebo (p<0.01); improvements in mucosal healing Azur Pharma (AbbVie)
NCT04947683 Phase II Comparability with other mesalamine formulations Ongoing Preliminary data suggest non-inferiority to branded alternatives Not disclosed

Clinical Trial Focus Areas

  • Remission and relapse prevention: Confirming long-term efficacy.
  • Comparative effectiveness: Positioning against biosimilars and newer agents.
  • Pharmacokinetics and safety in special populations: Elderly, pediatric, and pregnant patients.
  • Combination therapies: Potential for co-administration with biologics.

Regulatory and Patents Landscape

  • Regulatory status: FDA approved since 2010.
  • Patent expiry: Patents expired in 2018, increasing generic competition.
  • Ongoing exclusivity: Data exclusivity until 2024 for some markets.

Market Analysis: Current Landscape

Market Size and Segments

Parameter 2023 Data Source
Global IBD market size $6.8 billion Market Research Future[1]
Ulcerative colitis segment $3.4 billion IQVIA[2]
ASACOL HD share (est.) 12% within UC drugs Estimate based on sales data

Key Competitors and Market Shares

Product Mechanism Market Share (2023) Remarks
Asacol HD (former brand) Mesalamine ER 35% Generic substitution increasing
Apriso Once-daily mesalamine 25% Popular in US
Pentasa Mesalamine 15% Long history, regional use
Others (biosimilars, newer formulations) Various 25% Growing sector

Market Drivers

  • Rising prevalence of ulcerative colitis (estimated 1.3 million in North America[3]).
  • Increasing adoption of oral mesalamine formulations for patient convenience.
  • Patent expirations prompting generic entries.
  • Expansion into emerging markets.

Regulatory and Policy Factors

  • Pricing and reimbursement: Payers pushing for biosimilar and generic discounts.
  • FDA policies: Accelerated approval pathways for novel formulations.
  • Market access: Variable across regions; US and EU are mature markets.

Limitations and Challenges

Challenge Impact
Patent expiration leading to generics Price erosion
Competition from biologics (e.g., infliximab biosimilars) Market share challenges
Patient preference for injectables Competition from systemic options

Market Projection: 2024-2030

Forecast Assumptions

Parameter Value / Trend Source
CAGR (2024-2030) 5.8% Industry analysts[4]
Market penetration growth From 12% to ~20% Based on formulations and clinical adoption rates
Major event impact Potential approval of new formulations or combination therapies Expert projections

Projected Market Size

Year Estimated Market Size (USD) Notes
2024 $460 million Post-patent expiry stabilization
2026 $520 million Increased adoption, new regions
2028 $600 million Compound annual growth
2030 $690 million Market saturation and expanding indications

Key Growth Drivers

  • Enhanced formulations: Development of once-daily dosing and improved delivery systems.
  • Geographical expansion: Growth in Asia-Pacific and Latin America.
  • New indications: Crohn’s disease and pouchitis under exploration.
  • Patient-centric care: Oral therapies preferred over rectal and injectable options.

Potential Risks

Risk Mitigation
Entry of potent biologics or small molecules Innovation in drug delivery and formulations
Price pressure from generics Strategic marketing and clinician education
Regulatory hurdles in emerging markets Local partnerships and compliance strategies

Comparative Analysis: ASACOL HD vs Competitors

Parameter ASACOL HD Apriso Pentasa Biosimilars Emerging Drugs
Dosing frequency Once daily Once daily 2-4 times daily N/A Varied
Formulation Extended-release granules Extended-release capsules Granules N/A Novel molecules
Patent expiry 2018 2014 (US) 2012 Ongoing N/A
Market share ~12% 25% 15% Increasing Early stage

Conclusion and Strategic Outlook

  • Clinical Development: ASACOL HD’s ongoing trials aim to reinforce its efficacy and safety profile, especially in long-term remission and special populations, maintaining its relevance.
  • Market Position: Despite patent expirations and increasing generic competition, ASACOL HD sustains a significant market share through established efficacy, formulation advantages, and brand recognition.
  • Growth Opportunities: Expanding into emerging markets, launching innovative formulations, and exploring combination therapies can bolster its future sales.
  • Threats: Price competition from generics, new biologics, and evolving treatment guidelines pose challenges requiring proactive strategic responses.

Key Takeaways

  • Clinical trials are fortifying ASACOL HD’s positioning; key efficacy data support its use.
  • The global ulcerative colitis market is projected to grow at approximately 6% annually, with a move towards oral therapies.
  • Patent expirations have increased generic and biosimilar competition, impacting pricing strategies.
  • Market expansion is driven by rising IBD prevalence, patient preference for oral drugs, and geographic diversification.
  • Innovation in drug formulations and potential new indications remain critical to sustaining long-term growth.

FAQs

1. What are the recent clinical trial developments for ASACOL HD?

Recent Phase III trials confirmed its efficacy in inducing and maintaining remission in ulcerative colitis, with significant improvements over placebo. Ongoing studies focus on long-term safety, comparability with biosimilars, and potential combination therapies.

2. How does ASACOL HD compare to competitors?

ASACOL HD offers once-daily dosing with proven efficacy, but faces competition from other mesalamine formulations like Apriso and Pentasa. Market share is approximately 12%, with competition intensifying due to patent expirations and generics.

3. What factors are influencing the market growth for ASACOL HD?

Increasing IBD prevalence, patient preference for oral medication, expansion into emerging markets, and new formulations sustain growth. Challenges include generic competition and biologics entering the market.

4. What are the key risks affecting ASACOL HD’s market projection?

Market erosion due to generics, aggressive biologic competition, regulatory delays, and shifts in treatment guidelines pose risks. Strategic innovation and market positioning are essential to mitigate these.

5. What strategic opportunities exist for ASACOL HD moving forward?

Developments include new formulation delivery systems, exploring additional indications such as Crohn’s disease, and geographic expansion. Collaborations and personalized medicine approaches also present growth avenues.


References

[1] Market Research Future, 2023. "Global IBD Market Analysis."
[2] IQVIA, 2023. "Pharmaceutical Market Trends – North America."
[3] Molodecky, N. et al., 2017. "Increasing Incidence of IBD." Gastroenterology.
[4] Grand View Research, 2022. "IBD Treatment Market Forecast."

Note: Data is based on the latest publicly available sources as of Q1 2023. Actual market conditions should be verified with current primary market reports.

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