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MHS-1031

Phase 2

Gastroesophageal Reflux | Small molecule | Gastrointestinal |Catalyst Pharmaceuticals, Inc.|Last Updated: Mar 25, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials1
Total Enrollment247

FDA Designations

No designations recorded

Clinical trial landscape

MHS-1031 · 1 trial · 1 indication

Phase 2 1
NCT05556824Multi-Center Study of Panosyl-Isomaltooligosaccharides Adjunctive to PPI Therapy to Treat GERDGastroesophageal Reflux
ACTIVE NOT_RECRUITING247 Analytics
PHASE2ACTIVE NOT_RECRUITING
Multi-Center Study of Panosyl-Isomaltooligosaccharides Adjunctive to PPI Therapy to Treat GERD
Gastroesophageal RefluxUnlock trial analytics

Study Endpoints

Primary Endpoints

Heartburn-free days/week
4 and 8 weeks

The difference between baseline weekly average heartburn-free days and weekly average heartburn-free days during Treatment Phase Weeks 1-4 and Weeks 5-8 (as measured using questions 1, 2 and 3 of the Reflux Symptom Questionnaire Electronic Diary) (RESQ-eD).

Secondary Endpoints

Heartburn symptom severity
4 and 8 weeks
Heartburn-free day satisfaction
4 and 8 weeks
GERD-related severity satisfaction
4 and 8 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Drug ProductACTIVE_COMPARATORPanosyl-isomaltooligosaccharide (PIMO) liquid 1 g (1.5 ml) per day for 8 weeks
PlaceboPLACEBO_COMPARATORPlacebo liquid (1.5 ml) per day for 8 weeks

Interventions

NameTypeDescription
MHS-1031DRUGStudy medication will be supplied as a syrup in individual sachets containing 1g (1.5 mL) of MHS-1031. Subjects will be randomized in 2:1 fashion to either study drug (2) or placebo (1)
PlaceboOTHERMatching placebo is an oral solution formulated to have a degree of sweetness and acidity similar to the study medication and will be provided in equivalent sachets containing 1.5g (1.5 mL) of the oral placebo solution.
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites18

Inclusion Criteria: * In the opinion of the investigator or sub-investigators, the subject is capable of understanding and complying with protocol requirements, including compliance with completing nightly online questionnaires in one of the IRB-approved languages. * Subject signs and dates an elec...

Countries:United States
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Frequently asked questions about MHS-1031

What is MHS-1031 used for?

MHS-1031 is an investigational small molecule being developed for the treatment of Gastroesophageal Reflux (GERD). It is intended to be used as an adjunctive therapy to proton pump inhibitor (PPI) therapy. The drug is currently in Phase 2 clinical development and has not been approved by regulatory authorities.

How does MHS-1031 work?

MHS-1031 is a small molecule being studied as an adjunctive therapy to proton pump inhibitors (PPIs) for Gastroesophageal Reflux. Its specific molecular target has not been disclosed in available clinical trial information. The ongoing Phase 2 trial is evaluating its efficacy and safety in combination with PPI therapy.

Who is developing MHS-1031?

MHS-1031 is being developed by Catalyst Pharmaceuticals, Inc., a biopharmaceutical company traded on NASDAQ under the ticker symbol CPRX. The company is conducting a Phase 2 clinical trial of MHS-1031 for Gastroesophageal Reflux in the United States.

What phase is MHS-1031 in?

MHS-1031 is in Phase 2 clinical development. It is an investigational drug and has not been approved by the FDA or any other regulatory agency. The ongoing Phase 2 trial is active but not recruiting participants, with an estimated enrollment of 247 patients.

What clinical trials is MHS-1031 in?

MHS-1031 is being studied in a Phase 2 clinical trial registered as NCT05556824, titled "Multi-Center Study of Panosyl-Isomaltooligosaccharides Adjunctive to PPI Therapy to Treat GERD." This randomized, double-blind, placebo-controlled trial is enrolling 247 adults aged 18 years and older in the United States.

Is MHS-1031 the same as Panosyl-Isomaltooligosaccharides?

MHS-1031 is also known as Panosyl-Isomaltooligosaccharides, based on the clinical trial title. The Phase 2 study NCT05556824 evaluates this compound as an adjunctive therapy to proton pump inhibitors for Gastroesophageal Reflux. The drug is being developed by Catalyst Pharmaceuticals under the name MHS-1031.