Food Safety Report: Olive Garden Italian Restaurant, Ed Noble Parkway, Norman, OK, USA 10 months ago • details 34 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Headache Suspected source: Olive Garden salad or chicken Alfredo Onset: 12 to 24 hours Duration: 4 to 12 hours Sick: Me Additional information: Can’t keep any food or fluids down. Keep throwing up phlegm