For quick relief of upset stomach or acid indigestion caused from too much to eat or drink, drop two tablets in an eight-ounce glass of water. Make sure that the tablets have dissolved completely before drinking the preparation. Repeat in six hours for maximum relief. Do not take more than four tablets in a twenty-four-hour period. Each tablet contains aspirin, sodium bicarbonate, and citric acid. If you are on a sodium-restricted diet, do not take this medication except under the advice and supervision of your doctor. Not recommended for children under twelve years old or adults over sixty-five.