<p>Ranibizumab is a recombinant humanised IgG1 kappa monoclonal antibody fragment which binds to active forms of human vascular endothelial growth factor A (VEGF-A) and inhibits their biologic activity. Binding of ranibizumab to VEGF-A inhibits VEGF from binding to its receptors, thereby suppressing neovascularisation (angiogenesis), endothelial cell proliferation and vascular permeability.</p>