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Inmazeb

Phase 2

Ebola Virus Disease | Small molecule | Infectious Disease |Regeneron Pharmaceuticals, Inc.|Last Updated: Jan 22, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment132

FDA Designations

No designations recorded

Clinical trial landscape

Inmazeb · 1 trial · 1 indication

Phase 2 1
NCT05202288Impact of Delay Between Administration of Inmazeb Administration and Vaccination by Ervebo on Vaccine Immune Response on Healthy VolunteersEbola Virus Disease
NOT YET_RECRUITING132 Analytics
PHASE2NOT YET_RECRUITING
Impact of Delay Between Administration of Inmazeb Administration and Vaccination by Ervebo on Vaccine Immune Response on Healthy Volunteers
Ebola Virus DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Neutralizing antibodies rates
Day 1, Day 29, Day 57, Day 85 and during participant's early termination

The level will be evaluated with a pseudo-type plaque reduction neutralization test

Secondary Endpoints

Anti-EBOV GP IgG rates
Day 1, Day 29, Day 57, Day 85 and during participant's early termination
RT-PCR VSV
Day 3
T cell response
Day 1, Day 29
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Ervebo 72 million PFUACTIVE_COMPARATORThe control arm (vaccination alone) will serve to characterize the immune response to the vaccine and it will be used as a comparator of vaccine immune response in the intervention arms. Administration at D1.
Inmazeb 150mg/kgACTIVE_COMPARATORThis second control arm of mAb alone will serve to characterize the pharmacokinetic profile of mAb in the Guinean population. Administration at D1.
Inmazeb 150mg/kg + Ervebo 72 million PFUEXPERIMENTALThe Arm 3, is a concomitant administration of the antibody and the vaccine at D1.
Inmazeb 50mg/kg + Ervebo 72 million PFUEXPERIMENTALThe Arm 4, is a concomitant injection of different-dose of the antibody and the vaccine. This design mimics a time interval of 15 days between Ervebo and Inmazeb administration. The administration will be at D1. These may help define a time interval between Ervebo administration and Inmazeb infusion.
Inmazeb 10mg/kg + Ervebo 72 million PFUEXPERIMENTALThe Arm 5, is a concomitant injection of different-dose of the antibody and the vaccine. This design mimics a time interval of 57 days between Ervebo and Inmazeb administration. The administration will be at D1. These may help define a time interval between Ervebo administration and Inmazeb infusion.
Inmazeb 0.7mg/kg + Ervebo 72 million PFUEXPERIMENTALThe Arm 6, is a concomitant injection of different-dose of the antibody and the vaccine. This design mimics a time interval of 169 days between Ervebo and Inmazeb administration. The administration will be at D1. These may help define a time interval between Ervebo administration and Inmazeb infusion.

Interventions

NameTypeDescription
ErveboBIOLOGICALAdministration of r-VSV-ZEBOV vaccine
InmazebDRUGAdministration of Inmazeb
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersYes

Inclusion Criteria: * Available for the duration of the protocol follow-up; * Consent to participate ; * Agreed not to participate in another clinical research study until the end of the trial follow-up. Exclusion Criteria: * Prior history of EVD (self-reported); * Previous vaccination with r-VSV...

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Frequently asked questions about Inmazeb

What is Inmazeb used for?

Inmazeb is being developed for Ebola Virus Disease. It is an investigational therapy from Regeneron Pharmaceuticals, Inc. (ticker: REGN) and is currently in Phase 2 clinical development. The only listed trial is in healthy volunteers and examines the impact of the delay between Inmazeb administration and vaccination with Ervebo on vaccine immune response.

Who makes Inmazeb?

Inmazeb is made by Regeneron Pharmaceuticals, Inc., which trades under the ticker REGN. Regeneron is the developer of the drug, and the company is responsible for its clinical development program in Ebola Virus Disease.

What phase is Inmazeb in?

Inmazeb is in Phase 2 clinical development. The only listed trial is a Phase 2 study, and it is currently not yet recruiting. There are no completed trials listed for Inmazeb. The drug is investigational and has not been approved by the FDA for any indication based on the available information.

What clinical trials is Inmazeb in?

Inmazeb is being studied in one clinical trial: NCT05202288, titled "Impact of Delay Between Administration of Inmazeb Administration and Vaccination by Ervebo on Vaccine Immune Response on Healthy Volunteers." This Phase 2 trial has an enrollment of 132 participants, is active controlled, randomized, and is not yet recruiting.

Is Inmazeb the same as Ervebo?

No, Inmazeb and Ervebo are different products. Inmazeb is an investigational therapy developed by Regeneron Pharmaceuticals for Ebola Virus Disease. Ervebo is a vaccine that is referenced in the Inmazeb clinical trial NCT05202288, which examines the impact of the delay between Inmazeb administration and Ervebo vaccination on vaccine immune response.