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COVID-19 Study to Evaluate Safety, Tolerability, and Efficacy of REGN14256+Imdevimab for the Treatment of COVID-19 Adult and Adolescent Patients Without Risk Factors for Progression to Severe Disease

NCT05081388 · Status: TERMINATED · Phase: PHASE1/PHASE2 · Type: INTERVENTIONAL · Enrollment: 25

Last updated 2025-10-28

Study results available
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Summary

Primary Objectives Phase 1 (Safety and Tolerability)

• Evaluate the safety and tolerability of REGN14256+imdevimab and REGN14256 monotherapy, as measured by treatment-emergent adverse events (TEAEs), injection-site reactions (ISRs), and hypersensitivity reactions

Phase 1/2 (Virologic Efficacy) • Evaluate the virologic efficacy of REGN14256+imdevimab and REGN14256 monotherapy compared to placebo, as measured by time-weighted average (TWA) change from baseline in viral load through day 7

Phase 1/2/3 (Clinical Efficacy)

• Evaluate the clinical efficacy of REGN14256+imdevimab compared to placebo, as measured by COVID-19 symptoms resolution

Secondary Objectives Phase 1 (Safety and Tolerability) • Evaluate the safety and tolerability of REGN14256+imdevimab and REGN14256 monotherapy, as measured by treatment-emergent serious adverse events (SAEs)

Phase 2 and Phase 3 (Safety and Tolerability)

• Evaluate the safety and tolerability of REGN14256+imdevimab and REGN14256 monotherapy, as measured by TEAEs, ISRs, hypersensitivity reactions, and SAEs

Phase 1, Phase 2, and Phase 3 (Virologic Efficacy, Drug Concentration, and Immunogenicity)

* Evaluate additional indicators of virologic efficacy of REGN14256+imdevimab and REGN14256 monotherapy
* Characterize the concentration-time profile of REGN14256 administered in combination with imdevimab or alone as a monotherapy
* Assess the immunogenicity of REGN14256 administered in combination with imdevimab or alone as a monotherapy

Conditions

Interventions

DRUG

REGN14256

Sub-cutaneous (SC) single dose

DRUG

imdevimab

SC single dose

DRUG

casirivimab + imdevimab

SC single dose

DRUG

Placebo

SC single dose

Sponsors & Collaborators

Principal Investigators

  • Clinical Trial Management · Regeneron Pharmaceuticals

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
12 Years
Max Age
65 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2021-11-08
Primary Completion
2022-06-30
Completion
2022-06-30
FDA Drug
Yes

Countries

  • United States

Study Locations

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Entities

Drugs
Diseases
Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05081388 on ClinicalTrials.gov