Dexlansoprazole. Molecular model of the drug dexlansoprazole (C16.H14.F3.N3.O2.S). This proton pump inhibitor is sold under the brand name Dexilant. It is used for the treatment of erosive oesophagitis and gastro-oesophageal reflux disease. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (dark blue), oxygen (red), sulfur (yellow) and fluorine (light blue).