 Pulmonary surfactant is produced in lungs in order to facilitate breathing by increasing total lung capacity, TLC, and lung compliance.In respiratory distress syndrome or RDS surfactant replacement therapy helps patients have normal respiration by using pharmaceutical forms of the surfactants.One example of pharmaceutical pulmonary surfactants is Survanta (beractant) or its generic form Beraksurf produced by Abbvie and Tekzima respectively.