What to expect from oral rehydration therapy for heat exhaustion

Heat exhaustion can leave you thirsty, weak, dizzy, headachy, nauseated, or unusually sweaty. An oral rehydration solution contains water, salts, and glucose in a balance that supports absorption in the gut. It supports hydration but does not directly cool an overheated body or treat a more serious heat illness.

Move to a cool place, loosen extra clothing, rest, and cool your skin with a fan or damp cloth. Take the prepared solution in frequent small sips; if nausea makes drinking difficult, pause briefly and restart more slowly. Follow the product instructions for mixing and storage, and do not make it stronger by adding less water. Avoid relying on alcohol or very sugary drinks while recovering.

Seek urgent medical help for confusion, fainting, a seizure, trouble breathing, inability to drink, repeated vomiting, or skin that is very hot with worsening symptoms. Arrange medical assessment if symptoms do not improve with cooling and sips of solution, or if dizziness and weakness return when standing.

Ask which solution is suitable for you, how much to take while symptoms continue, and whether another condition or medicine could make dehydration more concerning.