**6.2 Enzyme inhibition**

Enzyme inhibitors (e.g., bacitracin, bestatin, nafamostat mesylate, soybean trypsin inhibitor, potato carboxypeptidase inhibitor, phosphoramidon) has been shown to enhance pulmonary absorption of proteins and peptides [159–161]. In addition to insulin, the absorption of calcitonin has been shown to increase [161–164].
