Food Safety Report: Denny's, U.S. 290, Cypress, TX, USA 2 months ago • details 40 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Cramps, Chills, Headache Suspected source: Smoothie or steak Onset: 4 to 12 hours Duration: Several days Sick: Not sure