1. Replace Fluids
For mild dehydration or while waiting for medical care for an adult with severe dehydration that is not due to heat stroke: The person should try to drink 2 quarts of fluid, such as water, juice, or sports drinks, in 2 to 4 hours. The person should drink at least 10 glasses of liquid a day to replace lost fluids. If the person is elderly, fluid replacement may need to be done slowly. Consult a doctor. If the person is vomiting, try ice chips, popsicles, and small sips of fluid. 2. When to Call a Doctor for Mild Dehydration Seek medical help if: The person’s symptoms get worse or don't improve within 24 hours. The person is elderly. You think a prescription medication such as a diuretic caused the dehydration. 3. Follow Up For mild dehydration, the person should rest for 24 hours and keep drinking fluids, even if symptoms improve. Fluid replacement may take up to a day and a half. If dehydration is moderate to severe, fluids may need to be replaced intravenously (IV) in the hospital.
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