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BNT331

Phase 1

Bacterial Vaginosis | Small molecule | Infectious Disease |BioNTech SE|Last Updated: Aug 7, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment102

FDA Designations

No designations recorded

Clinical trial landscape

BNT331 · 1 trial · 1 indication

Phase 1 1
NCT06469164A First-in-human Safety Trial of BNT331 Administered as Single Ascending Doses in Healthy Women and as Multiple Ascending Doses in Women Diagnosed With Bacterial VaginosisBacterial Vaginosis
COMPLETED102 Analytics
PHASE1COMPLETED
A First-in-human Safety Trial of BNT331 Administered as Single Ascending Doses in Healthy Women and as Multiple Ascending Doses in Women Diagnosed With Bacterial Vaginosis
Bacterial VaginosisUnlock trial analytics

Study Endpoints

Primary Endpoints

Part A - Percentage of participants with adverse events (AEs) with onset after first treatment dose and until 7 days post-dose
from first dose of study treatment up to 7 days post-dose

In participants who have received at least one dose of BNT331 or placebo. For each dose level cohort of BNT331 and for the combined placebo group.

Part B - Percentage of participants with adverse events (AEs) with onset after first treatment dose and until 120 days after the first dose
from first dose of study treatment up to 120 days after first dose

In participants who have received at least one dose of BNT331 or placebo. For each dose level cohort of BNT331 and for the combined placebo group.

Part A - Percentage of participants with serious adverse events (SAEs) with onset after first treatment dose and until 7 days post-dose
from first dose of study treatment up to 7 days post-dose

In participants who have received at least one dose of BNT331 or placebo. For each dose level cohort of BNT331 and for the combined placebo group.

Part B - Percentage of participants with SAEs with onset after first treatment dose and until 120 days after the first dose
from first dose of study treatment up to 120 days after first dose

In participants who have received at least one dose of BNT331 or placebo. For each dose level cohort of BNT331 and for the combined placebo group.

Secondary Endpoints

Part A - Serum concentrations of BNT331 active substance at pre-specified timepoints
from pre-dose up to 12 days post-dose
Part B - Serum concentrations of BNT331 active substance at pre-specified timepoints
from pre-dose up to 30 days after first dose
Part A - Anti-drug antibody (ADA) prevalence and change of binding titers against BNT331 active substance in blood before study treatment and at 7 days post-dose
from pre-dose up to 7 days post-dose
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
BNT331 - Part AEXPERIMENTALSingle ascending dose levels
Placebo - Part APLACEBO_COMPARATORSingle dose
BNT331 - Part B Dose 1EXPERIMENTALFixed dose for 5 consecutive days
BNT331 - Part B Dose 2EXPERIMENTALFixed dose for 5 consecutive days
Placebo - Part BPLACEBO_COMPARATORMultiple dose

Interventions

NameTypeDescription
BNT331DRUGVaginal insert
PlaceboOTHERVaginal insert
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Eligibility Criteria

Age Range18 Years to N/A
SexFEMALE
Healthy VolunteersYes
Study Sites6

Inclusion Criteria (applicable to all participants unless otherwise specified): * Have given written informed consent by signing and dating the informed consent form (ICF) before initiation of any study-specific procedures. * Participant reported assigned female sex at birth, at least 18 years of a...

Countries:United States
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Frequently asked questions about BNT331

What is BNT331 used for?

BNT331 is an investigational small molecule being developed for the treatment of bacterial vaginosis, a common vaginal infection. It is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

Who makes BNT331?

BNT331 is being developed by BioNTech SE, a biotechnology company traded on the NASDAQ under the ticker symbol BNTX. The company is conducting clinical trials to evaluate the safety and efficacy of this investigational drug.

What phase is BNT331 in?

BNT331 is in Phase 1 clinical development. A first-in-human trial has been completed, which evaluated single ascending doses in healthy women and multiple ascending doses in women diagnosed with bacterial vaginosis.

What clinical trials is BNT331 in?

BNT331 has one completed Phase 1 clinical trial registered as NCT06469164. This trial enrolled 102 female participants in the United States and was a randomized, double-blind, placebo-controlled study assessing safety.

Is BNT331 the same as any other drug?

No alternative names for BNT331 have been reported. It is identified solely by its code name BNT331 in clinical trial registries and scientific literature.