What should you know about plus oral rehydration salts?

Diarrhoea and vomiting remove water and dissolved salts from the body. An oral rehydration solution contains glucose and electrolytes in a balance that helps the intestine absorb fluid. It does not stop the infection or treat every cause of fluid loss, but it can support hydration while the underlying illness settles.

Use the exact amount of clean water stated on the packet. A solution that is too concentrated or too diluted may not work as intended. Do not mix sachets with juice, milk or fizzy drinks, and do not add extra salt or sugar.

Take frequent small sips, especially after vomiting. If vomiting occurs, pause briefly and restart with smaller amounts. Continue suitable food and breastfeeding if tolerated. Prepare a fresh solution according to the product instructions and discard it within the stated time; keep it covered and away from heat.

A pharmacist or clinician can advise on the product and amount for a child, older adult or person with kidney, heart or other medical problems. Oral rehydration therapy may be needed when dehydration is more marked.

Get urgent medical help for confusion, unusual sleepiness, fainting, very little urine, severe weakness, blood in stool, severe abdominal pain or inability to keep fluids down. Babies, older adults and people with significant medical conditions can become dehydrated quickly and should be assessed promptly if symptoms continue.

Ask which preparation is suitable, how much to offer, how to adapt it after vomiting, and whether another illness or medicine could be causing fluid loss. Ask how to recognise dehydration in the person being cared for.