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SMT19969

Phase 3

Clostridium Difficile Infection | Small molecule | Infectious Disease |Summit Therapeutics Inc.|Trials Updated: Oct 9, 2026

SMT19969 development status

Highest phase Phase 3 (NCT03595553)
Phase scored for SMMTPhase 2
Registered trials 4 across 1 sponsor since Mar 2014

SMT19969 target and mechanism

ModalitySmall molecule

Also known as Ridinilazole

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials3
Total Enrollment886

FDA Designations

No designations recorded

SMT19969 clinical trials

SMT19969 · 3 trials · 2 indications

Phase 3 1Phase 2 2
NCT03595553Comparison of Ridinilazole Versus Vancomycin Treatment for Clostridium Difficile InfectionClostridioides Difficile Infection
COMPLETED759 Analytics
PHASE3COMPLETED
Comparison of Ridinilazole Versus Vancomycin Treatment for Clostridium Difficile Infection
Clostridioides Difficile InfectionUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants With Sustained Clinical Response (SCR) Defined as Clinical Response and no Recurrence of CDI Through 30 Days Post End of Treatment (EOT).
Day 40

This primary outcome measures the number of participants with Sustained Clinical Response (SCR). SCR is defined as Clinical Response and no recurrence of CDI through 30 days post End of Treatment (EOT). At D40, D70 and D100 the Investigator or medically qualified designee will determine if the patient has a sustained clinical response or experienced RECURRENCE since the previous assessment. The Investigator will assess cure/failure and recurrence based on available information which includes, but is not limited to, improvement from baseline in the number of UBMs, signs \& symptoms of CDI, and the requirement for CDI medication. The Investigator should assess cure/failure in a way that best reflects the Investigator's standard clinical practice.

Number of treatment emergent adverse events (AEs) and serious adverse events (SAEs) to evaluate safety and tolerability
30 days post End of Therapy
Evaluate the clinical outcome by assessment of sustained clinical response
30 days post End of Therapy

Sustained clinical response is defined as clinical cure at the Test of Cure Visit (Day 12) and no recurrence of CDAD within 30 days of End of Therapy

Secondary Endpoints

Clinical Response
Day 12
Clinical Cure
Day 12
Sustained Clinical Response Over 60 Days
Day 70
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ridinilazoleEXPERIMENTALridinilazole 200mg bid
vancomycinACTIVE_COMPARATORvancomycin 125 mg qid
Ridinilazole (SMT19969)EXPERIMENTAL200 mg capsule of Ridinilazole (SMT19969) twice a day for 10 days
FidaxomicinACTIVE_COMPARATOR200 mg tablet of Fidaxomicin twice a day for 10 days
SMT19969EXPERIMENTAL200 mg capsule of SMT19969 twice a day for 10 days with alternating 200 mg placebo twice a day

Interventions

NameTypeDescription
RidinilazoleDRUGridinilazole (200 mg bid)
VancomycinDRUGvancomycin (125 mg qid)
FidaxomicinDRUG -
SMT19969DRUG -
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites149

Inclusion Criteria Patients are eligible to be included in the study only if all the following criteria apply: 1. Patient must be at least 18 years of age, at the time of signing the informed consent. 2. Have signs and symptoms of CDI including diarrhea such that in the Investigator's opinion, CDI...

Countries:United StatesArgentinaAustraliaBrazilBulgariaCanadaGreeceHungaryNew ZealandPolandRomaniaRussiaSouth KoreaSpainCzechiaUnited Kingdom
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Frequently asked questions about SMT19969

What is SMT19969 used for?

SMT19969 is an investigational small molecule being developed for the treatment of Clostridium difficile infection, also known as Clostridium difficile-associated diarrhoea. It is currently in Phase 2 clinical development and has not been approved by regulatory authorities.

What does SMT19969 target?

SMT19969 is a small molecule antibiotic that targets Clostridium difficile bacteria. It is being studied for its ability to treat Clostridium difficile infection, a condition that causes diarrhoea and inflammation of the colon.

Who makes SMT19969?

SMT19969 is being developed by Summit Therapeutics Inc., a biopharmaceutical company. The company is conducting clinical trials to evaluate the safety and efficacy of SMT19969 for the treatment of Clostridium difficile infection.

What phase is SMT19969 in?

SMT19969 is in Phase 2 clinical development. A Phase 2 trial has been completed, and the drug remains investigational, meaning it has not yet been approved by the FDA or other regulatory agencies for commercial use.

What clinical trials is SMT19969 in?

SMT19969 has been studied in a Phase 2 clinical trial with the identifier NCT02092935. This completed trial compared SMT19969 with vancomycin for the treatment of Clostridium difficile-associated diarrhoea and enrolled 100 participants in the United States and Canada.

Is SMT19969 the same as ridinilazole?

SMT19969 is also known as ridinilazole. It is being developed by Summit Therapeutics Inc. for the treatment of Clostridium difficile infection. The drug is currently in Phase 2 clinical development.