Esoprex MUPS 20 mg is a proton pump inhibitor (PPI) formulated using the Multiple Unit Pellet System (MUPS) technology. This technology involves enteric-coated pellets that release the active ingredient, esomeprazole, in a controlled manner, enhancing its stability and absorption. Esomeprazole works by inhibiting the H+/K+ ATPase enzyme in the stomach lining, thereby reducing gastric acid production.