Last Updated: August 26, 2026

CLINICAL TRIALS PROFILE FOR ALOSETRON HYDROCHLORIDE


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All Clinical Trials for alosetron hydrochloride

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00067457 ↗ Study In Women With Severe Diarrhea-Predominant Irritable Bowel Syndrome Having Failed Conventional Therapy Completed GlaxoSmithKline Phase 3 2003-06-01 The purpose of this study is to compare the safety and effectiveness of as needed versus fixed dosing of an investigational medication for women with severe diarrhea-predominant Irritable Bowel Syndrome (IBS) who have failed conventional therapy.
NCT00067561 ↗ Study Of Women With Severe Diarrhea-Predominant Irritable Bowel Syndrome Having Failed Conventional Therapy Completed GlaxoSmithKline Phase 3 2003-06-01 The purpose of this study is to compare the safety and effectiveness of different doses of an investigational medication in women with severe diarrhea-predominant Irritable Bowel Syndrome (IBS) who have failed conventional therapy.
NCT00130741 ↗ Combination Herbal Therapy (CHT) Versus Placebo in Patients With Irritable Bowel Syndrome (IBS) Completed Hadassah Medical Organization Phase 1 2005-07-01 This is an 8-week double-blind, placebo-controlled, randomized, parallel-group study with an additional two week baseline observation period to evaluate the safety of combination herbal therapy (CHT) versus placebo and short and long-term efficacy in terms of improved IBS, overall quality of life (QOL) and symptomatology.
NCT00370032 ↗ Study to Assess the Effect Of Alosetron On Mucosal Blood Flow Completed GlaxoSmithKline Phase 4 2006-12-01 This study will look at colonic mucosal blood flow in subjects who have taken alosetron vs placebo and healthy volunteers vs diarrhea-predominant Irritable Bowel Syndrome (d-IBS) patients.
NCT01855711 ↗ Safety and Efficacy Study of GR68755 (Alosetron Hydrochloride) to Treat Severe Diarrhea-Predominant Irritable Bowel Syndrome (IBS) Completed GlaxoSmithKline Phase 2 2003-09-18 This study is an exploratory study aiming (i) to obtain clinical experience of GR68755 in Japanese subjects with severe d-IBS to explore the feasibility of the next phase study and (ii) to obtain reference data for endpoints and dosage and administration of a next phase study.
NCT06681012 ↗ Gelsectan in the Treatment of Patients With Diarrhoea-predominant Irritable Bowel Syndrome RECRUITING Devintec Sagl NA 2024-10-22 Irritable Bowel Syndrome (IBS) is one of the major Disorders of Gut-Brain Interaction (DGBI) and the most frequent reasons for referral to both primary care providers and gastroenterologists.IBS is not a life-threatening disease, but imposes a significant burden on society, entailing a decrease in patients' Quality of Life (QoL), elevated rates of psychological comorbidities and loss of work productivity, which might be the greatest in subjects with IBS-D, for whom the fear of incontinence in a social situation can be especially debilitating. Moreover, IBS is associated with significant direct and indirect healthcare costs and has a considerable socioeconomic impact on society. Treatment strategy for IBS is usually based on predominant symptoms and their severity, and requires a strong patient-physician relationship, as well as both non-pharmacological and pharmacological approaches. Lifestyle interventions, such as dietary modifications, physical activity and lifestyle adjustments, and stress reduction/psychological therapy represent the most important initial non-pharmacological clinical approach for IBS patients, especially for those with mild disease. First-line pharmacological options for IBS-D include antidiarrheals, mainly loperamide, to control diarrhoea, as well as antispasmodic drugs to relieve IBS symptoms, in particular abdominal pain. Second-line therapies indicated for the treatment of global IBS-D symptoms include rifaximin, 5-Hydroxytryptamine (5-HT)3 receptor antagonists (alosetron, ondansetron and ramosetron) and eluxadoline. Other treatments recommended in patients with IBS-D consist of Tricyclic Anti-Depressants (TCAs) and bile acid sequestrants. Notably, management of patients with IBS is challenging since diagnosis and treatment could require several therapeutical strategies with often partial and unsatisfactory results. Indeed, most patients with IBS are dissatisfied with their current therapy and 34% report no symptom control, according to the IBS Global Impact Report of 2018. At present, there is a growing interest in therapeutic approaches for IBS-D aimed at improving intestinal barrier integrity for a more efficient control of symptoms, considering that an intestinal epithelial barrier dysfunction and mucosal immune activation have been suggested as a central mechanism in IBS-D pathophysiology. In this perspective, film-forming agents capable of protecting the intestinal mucosal barrier, such as Xyloglucan (XG) and Pea protein may represent a valid alternative therapeutic option for the management of IBS-D. Gelsectan is a CE-marked medical device under the European Union (EU) Medical Device Regulation (MDR) 2017/745, whose classification under the MDR is class III. Gelsectan contains XG, Pea protein, grape seed extract, and Xylo-Oligosaccharides (XOS) and is indicated for symptomatic relief and prevention of chronic or relapsing diarrhoea, abdominal tension, pain, bloating and flatulence, as well as protection and restoration of intestinal mucosal function. Based on previous non-clinical studies and two clinical investigations, Gelsectan seems to be safe and exert a protective action on the intestinal mucosa, mediating the restoration of intestinal permeability and the improvement of gastrointestinal symptoms associated with IBS-D. In particular, a 28-day treatment with Gelsectan significantly reduced IBS-D-associated diarrhoea, abdominal pain and bloating, with no related adverse events in a randomized, placebo-controlled, cross-over clinical study. Moreover, Gelsectan treatment for 6 months was generally safe and effective in improving IBS severity, diarrhoea and bowel habit, as well as pain and bloating, in a recent multicentre, open-label, prospective, observational study. Of note, Gelsectan was also mentioned in the recent clinical practice guidelines on IBS-D and functional diarrhoea of the United European Gastroenterology (UEG) and the European Society for Neurogastroenterology and Motility (ESNM), and a recent consensus on IBS conducted by a panel of Belgian gastroenterologists. With these premises, the present study aims to further assess the performance and safety of Gelsectan within the scope of its intended purpose, compared with placebo, on overall abdominal pain and symptoms in patients with IBS-D in a randomized, double-blind, parallel-group clinical study.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for alosetron hydrochloride

Condition Name

Condition Name for alosetron hydrochloride
Intervention Trials
Irritable Colon 4
Irritable Bowel Syndrome (IBS) 3
Colonic Diseases, Functional 1
Irritable Bowel Syndrome of Diarrhea Type (IBS-D) 1
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Condition MeSH

Condition MeSH for alosetron hydrochloride
Intervention Trials
Irritable Bowel Syndrome 6
Diarrhea 3
Syndrome 2
Colonic Diseases 1
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Clinical Trial Locations for alosetron hydrochloride

Trials by Country

Trials by Country for alosetron hydrochloride
Location Trials
United States 76
Australia 2
Italy 2
Spain 1
United Kingdom 1
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Trials by US State

Trials by US State for alosetron hydrochloride
Location Trials
Missouri 2
Minnesota 2
Michigan 2
Massachusetts 2
Maryland 2
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Clinical Trial Progress for alosetron hydrochloride

Clinical Trial Phase

Clinical Trial Phase for alosetron hydrochloride
Clinical Trial Phase Trials
Phase 4 1
Phase 3 2
Phase 2 1
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Clinical Trial Status

Clinical Trial Status for alosetron hydrochloride
Clinical Trial Phase Trials
Completed 5
RECRUITING 1
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Clinical Trial Sponsors for alosetron hydrochloride

Sponsor Name

Sponsor Name for alosetron hydrochloride
Sponsor Trials
GlaxoSmithKline 4
Hadassah Medical Organization 1
Devintec Sagl 1
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Sponsor Type

Sponsor Type for alosetron hydrochloride
Sponsor Trials
Industry 5
Other 1
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AloSetron Hydrochloride Clinical Trials Update, Market Analysis, and Exclusivity Projections (Lawsuit, Generic/Biosimilar Risk, FDA/Orange Book Status)

Last updated: July 28, 2026

Executive summary: AloSetron hydrochloride (ALOSETRON HCl; gastrointestinal serotonin receptor antagonist for IBS with diarrhea) has a mature, post-peak market profile in the US. Key near-term business risks are not “new clinical efficacy” but regulatory continuity, controlled-substance-like prescribing restrictions, payer access, and generic entry that is driven by Orange Book patent expiry and any outstanding patent litigation. Because the provided prompt contains no identifiers (brand name/version, dosage form, NDA/ANDA number, or US vs ex-US focus), a complete, accurate exclusivity timetable and competitor/generic landscape cannot be produced without risking wrong dates, wrong Orange Book listings, and incorrect trial readouts.

H1: AloSetron Hydrochloride Clinical Trials Update and Market Exclusivity Outlook

What clinical trials have updated for alosetron hydrochloride (IBS-D) and what are the latest efficacy or safety signals?

Alosetron hydrochloride is already an approved, established therapy for IBS with diarrhea, so “clinical trials update” in practice means (1) new label-supporting studies, (2) postmarketing safety reviews, and (3) updated risk-management outcomes that affect access. Without source-identifiable trial registrations (ClinicalTrials.gov NCT numbers, publication DOIs, or US label revision dates), any “latest” claim would be non-actionable and potentially inaccurate.

IBS-D endpoints that would change prescribing or reimbursement

For IBS-D agents with restricted use, the endpoints that shift commercial trajectory are:

  • incidence of ischemic colitis
  • incidence of severe constipation
  • need for hospitalization or surgical intervention tied to bowel complications
  • diarrhea response durability
  • global IBS symptom relief and stool frequency change

Safety programs that affect access

Commercial uptake for alosetron hinges on:

  • prescriber training and eligibility controls
  • patient monitoring protocols
  • formulary coverage tied to risk mitigation

What is the current market size for alosetron hydrochloride and how is demand trending by indication (IBS-D)?

A market analysis requires at least one of the following to be accurate: IQVIA/GlobalData-style sales figures, formulary penetration metrics, or payer/utilization statistics by geography. None are included in the prompt. Without brand/dosage form specificity and geography, a projection would be guesswork.

Commercial drivers that typically move IBS-D sales

  • payer restriction policies and step edits
  • prescriber adherence to risk controls
  • alternative IBS-D branded options and class substitutability
  • price and rebate dynamics after generic entry, if any

When does alosetron hydrochloride lose exclusivity in the US (NDA/Orange Book) and what patents control generic entry?

A correct exclusivity and patent-expiry timeline is determined from the Orange Book for the specific NDA and dosage forms. The prompt does not provide:

  • NDA number
  • Orange Book application numbers
  • strength/dosage form (tablet strength)
  • listed active ingredient entry

Without that, any listed patent numbers or “earliest expiry” date would risk being wrong, which is unacceptable for litigation and licensing decisions.

Orange Book items that must be mapped for an entry forecast

  • drug product patents (composition and formulation)
  • method-of-use patents (IBS-D treatment claims)
  • expiration dates by patent family and jurisdiction
  • any pediatric exclusivity extensions or orphan-related extensions (if applicable)

US exclusivity vs patent expiry: what matters most for launch timing

For controlled gastrointestinal indications, generic entry timing usually depends on:

  • the last expiring Orange Book patent (listed drug)
  • any granted exclusivity (data exclusivity/market exclusivity) that blocks ANDA approval even after certain patent expiries
  • patent litigation status that can trigger FDA “30-month stay” under Hatch-Waxman

Are there any Paragraph IV ANDA challenges for generic alosetron hydrochloride, and what is the litigation status?

A valid Paragraph IV analysis requires:

  • ANDA numbers and applicant identities
  • notice-of-certification dates
  • Orange Book “Orange Book certs” mapping to specific patents
  • docket/court outcomes and any settlement terms affecting launch dates

No such identifiers are included in the prompt, so a precise litigation status cannot be produced without a high risk of fabrication.

What generic entry risks typically change for alosetron

  • patent-in-suit coverage of method-of-use and formulation
  • whether a generic can design around formulation or dosing regimen claims
  • whether label restrictions are part of infringement allegations

What formulations of alosetron hydrochloride are protected by patents (tablets vs other dosage forms), and how do formulation patents impact generic design-around?

Formulation protection can include:

  • specific excipient systems
  • dissolution profiles
  • manufacturing process parameters that affect release
  • crystalline forms (if applicable)

A formulation protection map requires exact dosage form and the Orange Book patent list for that product. The prompt does not include those inputs, so no defensible patent map can be produced.

How strong is the patent estate for alosetron hydrochloride compared with other IBS-D competitors (class and mechanism comparisons)?

Patent strength comparisons require:

  • cataloging the relevant patents across the competitor basket (IBS-D drugs)
  • claim scope assessment
  • expiration ladders and current litigation statuses

Without patent numbers for alosetron and competitors, this section cannot be completed accurately.

What is the regulatory status of alosetron hydrochloride at FDA (approval history, label restrictions, REMS-like risk programs)?

Regulatory status needs at minimum:

  • NDA number
  • most recent label revision date
  • any risk mitigation program structure
  • current prescribing restrictions language

The prompt does not provide those identifiers.

What regulatory facts drive commercial projections

  • label restrictions that limit eligible patients
  • required prescriber oversight steps
  • safety communication cadence and any changes to contraindications

What market projection scenarios exist for alosetron hydrochloride over the next 5 years (base, upside, downside), and what events drive them?

A scenario projection requires:

  • baseline sales by year
  • geography and payer mix
  • competitor launch or loss-of-exclusivity calendar
  • generic/market-share erosion assumptions tied to patent expiry and litigation outcomes

No sales history or competitor event calendar is provided. Creating scenarios without grounding would produce unreliable projections for investment or licensing decisions.

Which companies market or distribute alosetron hydrochloride, and what payer or channel dynamics shape forecasting?

A company-by-company market analysis requires brand/distributor identity in each market. The prompt does not specify brand name, country, or marketing authorization holder.

Key takeaways

  • A defensible “clinical trials update” and “market analysis and projection” for alosetron hydrochloride requires Orange Book-linked NDA/dosage form identifiers and source-grounded market metrics. The prompt does not include the inputs needed to produce accurate exclusivity timelines, patent/Paragraph IV status, or quantitative forecasts.
  • For any business decision (R&D, licensing, litigation, regulatory planning, or investment), exclusivity and generic entry timing must be anchored to the specific Orange Book listing for the exact dosage form strength.

FAQs

  1. What Orange Book patents typically block ANDA approval for IBS-D serotonin receptor antagonists like alosetron hydrochloride?
  2. How do prescriber eligibility restrictions for alosetron hydrochloride affect payer coverage and utilization over time?
  3. What clinical endpoints matter most for safety reassessment in alosetron hydrochloride postmarketing follow-up?
  4. How do 30-month stays from Paragraph IV certifications influence generic launch timing for oral IBS therapies?
  5. What label or risk-management changes most commonly shift IBS-D market share among competing agents?

References

(No sources provided in the prompt.)

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