People with food poisoning commonly experience diarrhea, another method by which the body attempts to rid itself of infection. The most dangerous side effect of diarrhea is dehydration, so it is important to drink plenty of fluids, even if you cannot keep them down. If diarrhea lasts more than 48 hours, it is best to see a doctor. In addition to rehydration, probiotics can help replenish healthy bacteria lost to medication and symptoms.

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