<prompt> Which of the following is not an antacid drug: March 2005Aluminium hydroxideMagnesium sulphateSodium bicarbonateCalcium carbonate  <response>: Ans. B: Magnesium sulphate Examples of antacids Aluminium hydroxide Magnesium hydroxide, magnesium trisilicate Phillips Milk of Magnesia Aluminum carbonate gel Calcium carbonate Sodium bicarbonate, Sodium citrate Bismuth subsalicylate Magaldrate 