Casirivimab and imdevimab

(REGEN-COV®)

REGEN-COV®

Drug updated on 11/4/2024

Dosage FormInjection (intravenous; 600 mg)
Drug ClassRecombinant human monoclonal antibodies (mAbs)
Ongoing and
Completed Studies
ClinicalTrials.gov

Indication

  • Indicated for the treatment of mild to moderate coronavirus disease 2019 (COVID-19) in adult and pediatric patients (12 years of age and older weighing at least 40 kg) with positive results of direct SARS-CoV-2 viral testing, and who are at high risk for progression to severe COVID-19, including hospitalization or death.

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Summary
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  • This summary is based on the review of 11 systematic review(s)/meta-analysis(es). [1-11]
  • Mortality Reduction: Casirivimab/imdevimab significantly reduced mortality in COVID-19 patients (OR (odds ratio) = 0.62; 95% CI (confidence interval) = 0.40-0.98), with higher effectiveness observed in seronegative individuals (OR = 0.67, 95% CI 0.50-0.91). Bamlanivimab/etesevimab also decreased mortality (OR = 0.13, 95% CI = 0.02-0.77), though casirivimab/imdevimab showed greater effectiveness in baseline seronegative patients.
  • Progression of Clinical Symptoms: Casirivimab/imdevimab reduced the progression of clinical symptoms in COVID-19 patients (OR = 0.86; 95% CI = 0.79-0.93). Other treatments, such as remdesivir and IFN-alpha 2b, did not prevent disease progression in pregnant patients.
  • Hospitalization and Post-Exposure Prophylaxis: In non-hospitalized patients, casirivimab/imdevimab reduced the risk of hospitalization (OR = 0.43, 95% CI = 0.08-2.19) and, in post-exposure settings, significantly decreased SARS-CoV-2 infection (RR (relative risk) = 0.34, 95% CI = 0.23-0.48) and the development of clinical symptoms (RR = 0.19, 95% CI = 0.10-0.35). Other monoclonal antibodies like bamlanivimab and sotrovimab similarly reduced hospitalizations but with varied certainty.
  • Viral Load and Discharge Rates: Casirivimab/imdevimab improved viral load clearance and increased discharge rates in hospitalized COVID-19 patients.
  • General Safety Profile: Casirivimab/imdevimab (Regen-Cov) showed a slight increase in all-grade adverse events (AEs) (RR 1.14; 95% CI 0.98 to 1.31) but had no significant impact on serious adverse events (SAEs). Bamlanivimab also exhibited increased all-grade AEs, though with low certainty, while sotrovimab was associated with a reduction in SAEs (RR 0.27; 95% CI 0.12 to 0.63).
  • Pregnant Women: No major side effects were reported for casirivimab/imdevimab in pregnant women, though the limited availability of standardized clinical trials in this population underscores the need for further research.

Product Monograph / Prescribing Information

Document TitleYearSource
REGEN-COV (casirivimab and imdevimab) Prescribing Information.2022Regeneron Pharmaceuticals, Inc., Tarrytown, NY

Systematic Reviews / Meta-Analyses

Document TitleYearSource
Efficacy and safety of casirivimab-imdevimab combination on COVID-19 patients: A systematic review and meta-analysis randomized controlled trial2023Heliyon
Efficacy and safety of therapies for COVID-19 in pregnancy: a systematic review and meta-analysis2023Bmc Infectious Diseases
Assessment of the available therapeutic approaches for severe COVID-19: a meta-analysis of randomized controlled trials2023Scientific Reports
Casirivimab-imdevimab treatment is associated with reduced rates of mortality and hospitalization in patients with COVID-19: A systematic review with meta-analysis2023The Journal of Infection
Differential efficacy and safety of anti-SARS-CoV-2 antibody therapies for the management of COVID-19: a systematic review and network meta-analysis2023Infection
Comparative effectiveness of neutralising monoclonal antibodies in high risk COVID-19 patients: a Bayesian network meta-analysis2022Scientific Reports
SARS-CoV-2-neutralising monoclonal antibodies to prevent COVID-192022The Cochrane Database of Systematic Reviews
Susceptibility of SARS-CoV-2 Omicron Variants to Therapeutic Monoclonal Antibodies: Systematic Review and Meta-analysis2022Microbiology Spectrum
Interventions in an Ambulatory Setting to Prevent Progression to Severe Disease in Patients With COVID-19: A Systematic Review2022The Annals of Pharmacotherapy
Antibody and cellular therapies for treatment of covid-19: a living systematic review and network meta-analysis2021Bmj (clinical Research Ed.)
SARS-CoV-2-neutralising monoclonal antibodies for treatment of COVID-192021The Cochrane Database of Systematic Reviews

Clinical Practice Guidelines