COVID-19 Study Assessing the Safety and Tolerability of Co-Formulated Anti-Spike (S) SARS-CoV-2 Monoclonal Antibodies (Casirivimab+Imdevimab) in Adult Volunteers

NCT ID: NCT05181683

Last Updated: 2025-10-14

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE1
• Total Enrollment: 45 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-01-07
• Study Completion Date: 2022-06-03

Brief Summary

The primary objective of the study is to assess the safety and tolerability of co-formulated subcutaneous (SC) and intravenous (IV) casirivimab+imdevimab

The secondary objectives of the study are to:

• Explore variability in the drug concentration profiles of casirivimab and imdevimab after co-formulated subcutaneous (SC) or intravenous (IV) administration
• Characterize the immunogenicity of casirivimab and imdevimab in serum over time

Conditions

Healthy; Chronic Stable Illness

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Co-formulated casirivimab+imdevimab SC

Randomized 1:1

Group Type: EXPERIMENTAL

Casirivimab+Imdevimab

Intervention Type: DRUG

Randomized 1:1 for intravenous (IV) or subcutaneous (SC) administration

Co-formulated casirivimab+imdevimab IV

Randomized 1:1

Group Type: EXPERIMENTAL

Casirivimab+Imdevimab

Intervention Type: DRUG

Randomized 1:1 for intravenous (IV) or subcutaneous (SC) administration

Interventions

Casirivimab+Imdevimab

Randomized 1:1 for intravenous (IV) or subcutaneous (SC) administration

Intervention Type: DRUG

Other Intervention Names

REGN-COV2; Casirivimab; Imdevimab; REGEN-COV™; Ronapreve™

Eligibility Criteria

Inclusion Criteria

1. Is healthy, or has chronic medical condition(s) that per the opinion of the investigator is (are) stable, well-controlled, and not likely to require medical intervention through the end of study

2. Does not require medication(s) for co-morbid condition, or has received stable medication(s) for co-morbid condition(s) for at least 6 months prior to screening

3. Weighs between ≥60 kg and ≤100 kg at the time of screening

4. Has SARS-CoV-2-negative reverse-transcriptase polymerase chain reaction (RT-PCR) from a sample collected ≤72 hours prior to randomization, using local assay and sample collection and assay standards

5. Has completed a full course of COVID-19 vaccination more than 6 weeks prior to randomization

Exclusion Criteria

1. Has active respiratory or non-respiratory symptoms consistent with COVID-19 in the opinion of the Investigator

2. Has recent SARS-CoV-2 infection that resolved within 6 weeks prior to randomization

3. Prior use of casirivimab+imdevimab at any time prior to randomization

4. Prior, current, or planned use during the study of any of the following treatments: COVID-19 convalescent plasma, other monoclonal antibodies against SARS-CoV-2 (eg, bamlanivimab and etesevimab, sotrovimab), intravenous immunoglobulin (any indication), or any other investigational, authorized, or approved agent intended for COVID-19 treatment or prevention (with the exception of COVID-19 vaccines)

5. Treatment with another investigational drug in the last 30 days or within 5 half-lives of the investigational drug, whichever is longer, prior to screening

6. Body mass index (BMI) ≥28 kg/m2

7. Medically-attended acute illness, systemic antibiotics use, or hospitalization for any reason within 30 days prior to screening

8. Acute exacerbation of a chronic pulmonary condition (eg, chronic obstructive pulmonary disease [COPD], asthma exacerbations) in the past 6 months prior to screening

9. Uncontrolled hypertension, in the opinion of the investigator

10. History of heart failure hospitalization, diagnosis of a myocardial infarction, stroke, transient ischemic attack, unstable angina, percutaneous or surgical revascularization procedure (coronary, carotid, or peripheral vascular), or intracardiac device placement (eg, pacemaker) within 12 months prior to screening

11. Cancer requiring treatment currently or in the past 5 years, except for non-melanoma skin cancer or cervical/anus in-situ

12. Is pregnant at screening

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Regeneron Pharmaceuticals

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Clinical Trial Management

Role: STUDY_DIRECTOR

Regeneron Pharmaceuticals

Locations

Regeneron Study Site

Miami, Florida, United States

Regeneron StudySite

Winter Park, Florida, United States

Countries

United States

Other Identifiers

R10933-10987-COV-2179

Identifier Type: -

Identifier Source: org_study_id