Monensin (Monensin A) sodium, an orally active antibiotic, is an ionophore that mediates Na+/H+ exchange. Monensin sodium is a potent Wnt signaling inhibitor. Monensin sodium causes a marked enlargement of the multivesicular bodies (MVBs) and regulates exosome secretion. Monensin sodium can be used for bacterial, fungal, and parasitic infections research, and shows anticancer effects[1][2][3][4].