Overview
11 DESCRIPTION Vilobelimab is a chimeric human/mouse immunoglobulin G4 (IgG4) antibody consisting of mouse anti-human complement factor 5a (C5a) monoclonal binding sites (variable regions of heavy and light chain regions), and human gamma 4 heavy chain and kappa light chain constant regions.
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action GOHIBIC is a chimeric monoclonal IgG4-kappa antibody that binds to C5a with a dissociation constant of 9.6pM and blocks its interaction with the C5a receptor. C5a is part of the complement system and is activated as part of the innate immune response initiating an inflammatory cascade that includes increased vascular permeability, coagulation, proinflammatory cytokine release, and recruitment and activation of neutrophils and other myeloid cells. 12.2 Pharmacodynamics The reduction of C5a plasma concentration was evaluated in PANAMO. The median plasma concentrations of C5a at baseline in patients with severe COVID-19 pneumonia requiring IMV or ECMO were elevated and the values were comparable between the GOHIBIC group (118.
Common Doses
- 800 mg
- 80 mL
- 170 mL
- 250 mL
Dosage
2 DOSAGE AND ADMINISTRATION 2.1 Recommended Dosage The recommended dosage of GOHIBIC for the treatment of adults with COVID-19 is 800 mg administered by intravenous infusion after dilution [see Dosage and Administration (2.2) ] for a maximum of 6 (six) doses over the treatment period as described below. Treatment should be started within 48 hours of intubation (Day 1) followed by administration on Days 2, 4, 8, 15 and 22 as long as the patient is hospitalized (even if discharged from ICU). 2.
Contraindications
- 4 CONTRAINDICATIONS No contraindications have been identified based on the limited available data for the emergency use of GOHIBIC under this EUA.
Side Effects
- 6 ADVERSE REACTIONS 6.1 Clinical Trial Experience The following adverse reactions have been observed in the clinical studies of GOHIBIC that supported the EUA. The adverse reaction rates observed in these clinical studies cannot be directly compared to rates in the clinical studies of other products and may not reflect the rates observed in clinical practice. The safety of GOHIBIC is based on PANAMO, a Phase 3 randomized, placebo-controlled trial in COVID-19 patients requiring IMV or ECMO [see Clinical Studies (14) ] .
Interactions
- 7 DRUG INTERACTIONS No drug interaction studies have been conducted with GOHIBIC.