An oral suspension containing magnesium hydroxide, aluminum hydroxide and simethicone with antacid activity. Both magnesium hydroxide and aluminum hydroxide react with excess acid in the stomach thereby neutralizing gastric acid. Simethicone, a mixture of polydimethylsiloxane and silica gel, reduces the surface tension of gas bubbles, promoting gas bubble coalescence and so intestinal gas transit and evacuation. Check foractive clinical trials using this agent.