As with any drug, antacids should be used cautiously during pregnancy. Before taking antacids, pregnant women with acidity are recommended to try self-help measures such as: Eating smaller meals more frequently rather than three big meals in a day, Waiting three hours after a meal before lying down, Avoiding fatty and spicy foods, tea, coffee, chocolate and citrus juices, Raising the head of the bed so that your shoulders are higher than your tummy and You can roll a towel and place it under your mattress or simply use several pillows to prop yourself up when you lie down.