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Agent Mechanism of action Current FDA-approved indications and dosing Contraindications and cautions Tocilizumab (Actemra) Binds to soluble and membrane-bound IL-6 receptors and inhibits IL-6-mediated signaling Rheumatoid arthritis: 4 mg/kg IV every 4 weeks (up to 8 mg/kg every 4 weeks); 162 mg SQ every other week (up to every week)
Giant cell arteritis: 162 mg SQ once weekly or every other week
Polyarticular juvenile idiopathic arthritis: 8 mg/kg IV every 4 weeks (10 mg/kg if < 30 kg); 162 mg SQ every other week (every 3 weeks if < 30 kg)
Systemic juvenile idiopathic arthritis:8 mg/kg IV every other week (12 mg/kg if < 30 kg); 162 mg SQ every week (every other week if < 30 kg)
Cytokine release syndrome (due to CAR-T cell therapy): 8 mg/kg IV (10 mg/kg if < 30 kg)Avoid use in patients with:
• ANC < 2,000/mm3
• Platelet count < 100,000/mm3
• ALT/AST > 1.5 × ULN
• Tuberculosis or latent tuberculosis infection
Use with caution in patients with:
• Serious active infection
• Increased risk of gastrointestinal perforationSarilumab
(Kevzara)Binds to soluble and membrane-bound IL-6 receptors and inhibits IL-6-mediated signaling Moderately to severely active rheumatoid arthritis: 200 mg SQ every other week Avoid use in patients with:
• ANC < 2,000/mm3
• Platelet count < 150,000/mm3
• ALT/AST > 1.5 × ULN
• Tuberculosis or latent tuberculosis infection
Use with caution in patients with:
• Serious active infection
• Increased risk of gastrointestinal perforationSiltuximab (Sylvant) Binds to IL-6 and prevents binding of IL-6 to soluble and membrane-bound IL-6 receptors Multicentric Castleman disease: 11 mg/kg IV over 1 hour every 3 weeks until treatment failure Use with caution in patients with:
• Serious active infection
• Increased risk of gastrointestinal perforationALT = alanine aminotransferase; ANC = absolute neutrophil count; AST = aspartate aminotransferase; CAR-T = chimeric antigen receptor T cell; IV = intravenously; SQ = subcutaneously; ULN = upper limit of normal