ANTAYEN SYRUP Magaldrate 400MG and simethicone 60MG oral suspension is a medicine used to treat acidity, gas, bloating, and heartburn. Magaldrate works as an antacid to neutralize excess stomach acid, while simethicone is an anti-flatulent that helps break up gas bubbles, making them easier to pass. It is most effective when taken after meals or at the first sign of discomfort.