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MDX2301

Phase 1

COVID -19 | Monoclonal antibody | Infectious Disease |Opko Health Inc.|Last Updated: May 18, 2026

Target and mechanism

Molecular targetSARS-CoV-2
Target classVirus
ModalityMonoclonal antibody

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment80

FDA Designations

No designations recorded

Clinical trial landscape

MDX2301 · 1 trial · 2 indications

Phase 1 1
NCT07445971A Study Evaluating MDX2301 in Healthy Adults and Adults at Higher Risk for Severe COVID-19.COVID -19
RECRUITING80 Analytics
PHASE1RECRUITING
A Study Evaluating MDX2301 in Healthy Adults and Adults at Higher Risk for Severe COVID-19.
COVID -19Unlock trial analytics

Study Endpoints

Primary Endpoints

Adverse Events
Baseline until end of study, up to approximately 12 months

Incidence and severity of adverse events (AEs) and serious AEs (SAEs), including changes in clinical laboratory parameters.

Secondary Endpoints

Measure of maximum serum concentration (Cmax) of MDX2301
12 months
Measure of time to maximum concentration (Tmax) of MDX2301
12 months
Measure of terminal half-life (t1/2) of MDX2301
12 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Single Dose Healthy Adults MDX2301EXPERIMENTALHealthy Adults will receive a single dose of MDX2301 as intravenous infusion, intramuscular injection, or subcutaneous injection.
Single Dose Healthy Adults PlaceboPLACEBO_COMPARATORHealthy Adults will receive a single dose of placebo as intravenous infusion, intramuscular injection, or subcutaneous injection.
Repeat Dose Healthy Adults MDX2301EXPERIMENTALHealthy Adults will receive a single dose of MDX2301 as intramuscular injection or subcutaneous injection and then receive a repeat dose of MDX2301, 3 months later as intramuscular injection or subcutaneous injection.
Repeat Dose Healthy Adults PlaceboPLACEBO_COMPARATORHealthy Adults will receive a single dose of placebo as intramuscular injection or subcutaneous injection and then receive a repeat dose of placebo 3 months later as intramuscular injection or subcutaneous injection.
Single-Dose Higher Risk Adults MDX2301EXPERIMENTALAdults at higher risk for severe COVID-19 will receive a single dose of MDX2301 as intramuscular injection or subcutaneous injection.
Single-Dose Higher Risk Adults PlaceboPLACEBO_COMPARATORAdults at higher risk for severe COVID-19 will receive a single dose of placebo as intramuscular injection or subcutaneous injection.

Interventions

NameTypeDescription
MDX2301BIOLOGICALMDX2301 as intravenous infusion, intramuscular injection, or subcutaneous injection.
Normal SalineBIOLOGICALPlacebo as intravenous infusion, intramuscular injection, or subcutaneous injection.
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Eligibility Criteria

Age Range18 Years to 64 Years
SexALL
Healthy VolunteersYes
Study Sites2

Inclusion Criteria Healthy Adults 1. Participant is a healthy male or female, 18 to 64 years of age. 2. Participant is in good health in the opinion of the investigator. Adults at Higher Risk for Developing Severe COVID-19: 3. Participant is a male or female, 18 to 64 years of age. 4. Particip...

Countries:United States
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Recent Changes (Last 90 Days)

LOWAug 1, 2026NCT07445971primaryCompletionDate: changed
LOWAug 1, 2026NCT07445971primaryCompletionDate: changed
LOWAug 1, 2026NCT07445971primaryCompletionDate: changed

Frequently asked questions about MDX2301

What is MDX2301 used for?

MDX2301 is an investigational monoclonal antibody being developed for the prevention of COVID-19. It is currently being evaluated in a Phase 1 clinical trial in healthy adults and adults at higher risk for severe COVID-19. The drug is designed to target SARS-CoV-2, the virus that causes COVID-19.

What does MDX2301 target?

MDX2301 targets SARS-CoV-2, the virus responsible for COVID-19. As a monoclonal antibody, it is designed to bind to the virus, potentially neutralizing it and preventing infection. The drug is being studied for its ability to prevent COVID-19 in healthy adults and those at higher risk for severe disease.

Who makes MDX2301?

MDX2301 is being developed by Opko Health Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol OPK. The company is currently conducting a Phase 1 clinical trial to evaluate the safety and efficacy of MDX2301 in preventing COVID-19.

What phase is MDX2301 in?

MDX2301 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA. The ongoing Phase 1 trial is recruiting participants to evaluate the drug's safety, tolerability, and pharmacokinetics in healthy adults and those at higher risk for severe COVID-19.

What clinical trials is MDX2301 in?

MDX2301 is being studied in a Phase 1 clinical trial with the identifier NCT07445971. This randomized, double-blind, placebo-controlled trial is recruiting 80 participants in the United States. The study is evaluating MDX2301 in healthy adults and adults at higher risk for severe COVID-19, with a focus on prevention.

Is MDX2301 the same as any other drug?

MDX2301 is a unique investigational monoclonal antibody developed by Opko Health Inc. There are no alternative names provided for this drug. It is currently in Phase 1 clinical trials for the prevention of COVID-19 and is not yet approved for any use.