What to expect from oral rehydration therapy for food poisoning

Food poisoning can cause a combination of loose stools, vomiting, stomach cramps and fever. Losing fluid also means losing salts that help nerves and muscles work normally. Oral rehydration solution supplies water, glucose and salts in a measured balance. It supports hydration but does not remove toxins or treat every cause of foodborne illness. Learn more about [Food Poisoning](/conditions/food-poisoning/).

Prepare the solution exactly as directed, using safe water and the stated amount. Take a sip every few minutes; smaller amounts are often easier to keep down after vomiting. If you vomit, pause briefly and try again slowly. When appetite returns, choose light foods and continue drinking. Do not share a prepared solution, and discard it according to the product instructions. Details are available in [Oral Rehydration Therapy](/treatments/acute-and-urgent-care/oral-rehydration-therapy/).

Arrange urgent assessment for blood in vomit or stool, severe or persistent abdominal pain, high fever, confusion, fainting, very little urine, repeated vomiting, or inability to drink. Children, older adults, pregnant people and those with chronic illness may need help earlier. Medical review is also needed when diarrhoea continues or weakness is increasing despite fluid replacement.

Ask which solution is suitable, whether you should pause any medicines, what foods to try, and which symptoms would make testing or urgent treatment necessary.