[Certolizumab pegol].

Certolizumab pegol is a new anti-TNF drug formed by the Fab' fragment of a humanized mouse monoclonal antibody bound to two molecules of polyethylene glycol. Certolizumab pegol recognizes and binds to human TNF-α, both in its soluble and membrane bound form, and has shown clinical efficacy in controlled trials for the treatment of RA and Crohns' disease. In this review we summarize the structural characteristics and clinical efficacy data, as well as safety data of this anti-TNF agent in patients with RA.