Oral rehydration solutions: replace fluids and salts steadily

Oral rehydration solutions are not ordinary soft drinks. They are meant for situations where diarrhoea or vomiting has drained both fluid and salts, and the goal is to replace them in a steady, usable form.

This category is most useful to compare by how easy the product is to mix and keep taking in small amounts. Ready-to-drink options and powders both aim at the same principle. Small repeated sips are usually easier to tolerate than one large glass, especially when nausea is also present.

An oral rehydration solution becomes particularly useful when ordinary drinking is not keeping up with losses. That matters sooner in children, older adults, during pregnancy, and whenever vomiting is part of the picture.

Seek care if fluids will not stay down, urination becomes clearly reduced, there is confusion or unusual drowsiness, or diarrhoea comes with high fever or blood.