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Low Dose MT-1303

Phase 2

Ulcerative Colitis | Small molecule | Gastrointestinal |Bausch Health Companies Inc.|Last Updated: Sep 9, 2025

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment322

FDA Designations

No designations recorded

Clinical trial landscape

Low Dose MT-1303 · 1 trial · 1 indication

Phase 2 1
NCT04857112Study Evaluating Efficacy and Safety of Amiselimod (MT-1303) in Mild to Moderate Ulcerative ColitisUlcerative Colitis
COMPLETED322 Analytics
PHASE2COMPLETED
Study Evaluating Efficacy and Safety of Amiselimod (MT-1303) in Mild to Moderate Ulcerative Colitis
Ulcerative ColitisUnlock trial analytics

Study Endpoints

Primary Endpoints

Change from Baseline in the modified Mayo Score at Day 85
Baseline to Day 85

The modified Mayo Score for ulcerative colitis disease activity provides an assessment of disease severity and can be used to monitor subjects during therapy. Scoring is accomplished by summation of subscores for endoscopic findings, stool frequency, and rectal bleeding, with higher scores indicating worse severity. Each subscore ranges from 0 to 3. The modified Mayo Score is defined as the sum of the endoscopy findings subscore + stool frequency subscore + rectal bleeding subscore, with a range from 0 to 9.

Secondary Endpoints

The proportion of subjects with endoscopic improvement at Day 85
Baseline to Day 85
The change from Baseline in the 2-component Mayo Score at Day 85.
Baseline to Day 85
The proportion of subjects with clinical remission at Day 85 based on the modified Mayo Score
Baseline to Day 85
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Low DoseEXPERIMENTALMT-1303 loading dose of 0.4 mg once daily (QD) (Day 1-14) then maintenance dose of 0.2 mg QD (Day 15-85)
High DoseEXPERIMENTALMT-1303 loading dose of 0.8 mg QD (Day 1-14) then maintenance dose of 0.4 mg QD (Day 15-85)
PlaceboPLACEBO_COMPARATORMatching placebo, QD (Day 1-85)
Open Label Extension PeriodOTHER0.4 mg MT-1303 QD for 36 weeks for those participants who continue on to the OLE period from the double-blind portion of the clinical study

Interventions

NameTypeDescription
Low Dose MT-1303DRUGMT-1303 loading dose of 0.4 mg once daily (QD) (Day 1-14) then maintenance dose of 0.2 mg QD (Day 15-85)
High Dose MT-1303DRUGMT-1303 loading dose of 0.8 mg QD (Day 1-14) then maintenance dose of 0.4 mg QD (Day 15-85)
PlaceboDRUGMatching placebo, QD (Day 1-85)
MT-1303DRUG0.4 mg MT-1303 QD for 36 weeks for those participants who continue on to the OLE period from the double-blind portion of the clinical study
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites185

Inclusion Criteria: * Subjects will be eligible if they are male or female aged between 18 to 75 years at time of consent (inclusive) with normal vital signs and a diagnosis of active mild ulcerative colitis (UC) (modified Mayo Score of 3 or 4) or moderate UC (modified Mayo Score of 5 to 8) confirm...

Countries:United StatesAustraliaBelarusBulgariaCzechiaEstoniaGeorgiaGermanyHungaryItalyJapanMoldovaPolandRussiaSerbiaSlovakiaSouth KoreaTaiwanUkraine
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Frequently asked questions about Low Dose MT-1303

What is Low Dose MT-1303 used for?

Low Dose MT-1303 is an investigational small molecule being developed for the treatment of ulcerative colitis, a chronic inflammatory bowel disease. It is currently in Phase 2 clinical development and has not been approved by regulatory authorities. The drug is being studied for its efficacy and safety in patients with mild to moderate ulcerative colitis.

What does Low Dose MT-1303 target?

Low Dose MT-1303 is a small molecule that targets sphingosine 1-phosphate receptors, which play a role in immune cell trafficking. By modulating these receptors, the drug aims to reduce inflammation in the gastrointestinal tract. This mechanism is being evaluated in clinical trials for ulcerative colitis.

Who makes Low Dose MT-1303?

Low Dose MT-1303 is being developed by Bausch Health Companies Inc., a company traded on the stock exchange under the ticker symbol BHC. The drug is currently in Phase 2 clinical development for the treatment of ulcerative colitis.

What phase is Low Dose MT-1303 in?

Low Dose MT-1303 is in Phase 2 clinical development. It is an investigational drug, meaning it has not been approved by the FDA or other regulatory agencies. The drug is being studied for its safety and efficacy in patients with mild to moderate ulcerative colitis.

What clinical trials is Low Dose MT-1303 in?

Low Dose MT-1303 has been studied in one completed Phase 2 clinical trial with the identifier NCT04857112. This trial evaluated the efficacy and safety of the drug in patients with mild to moderate ulcerative colitis. The study enrolled 322 participants and was conducted across multiple countries, including the United States, Japan, and several European nations.

Is Low Dose MT-1303 the same as Amiselimod?

Yes, Low Dose MT-1303 is also known as Amiselimod. The clinical trial NCT04857112, which evaluated the drug for ulcerative colitis, refers to it as Amiselimod (MT-1303). This alternative name is used in the study title and may be encountered in medical literature and trial registries.