Food Safety Report: Denny's, Phoenix, AZ, USA 2 years ago • details 491 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Chills, Headache Suspected source: Expired mayonnaise Leftovers from here Onset: 4 to 12 hours Duration: 4 to 12 hours Sick: A loved one