Food Safety Report: Mercadona, A-7, 30830 Murcia, Spain 1 year ago • details 2 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Stomach Pain, Cramps, Headache Suspected source: Oat milk or porridge Onset: 12 to 24 hours Duration: 4 to 12 hours Sick: Me