If you or someone you know gets severe diarrhea, it will help to sip one to two litres of this simple mixture each day. This mixture is easily absorbed by the lining of the digestive tract, and will replenish electrolytes while giving you fluids. It doesn't cure the diarrhea, but it will make you feel better, and reduce the risk of dehydration. Both the Canadian government and the World Health Organization recommend this mixture.
Purified water: 1 L (4¼ cups)
Salt: 2.5 mL (½ teaspoon)
Sugar: 30 mL (6 teaspoons)
Your doctor may also recommend zinc supplements for several weeks afterwards, to replace what your body lost while you were ill.