Pegol is a term used in generic names for pharmaceutical drugs to indicate the presence of a polyethylene glycol attachment (pegylation). The term is used for monoclonal antibodies and engineered proteins as well as for small molecules. The purpose of the pegylation is to extend the half-life of the drug. Examples include: * Alacizumab pegol * Calaspargase pegol * Certolizumab pegol * Etirinotecan pegol * Lulizumab pegol