Food Safety Report: McDonald's, 3045 Pembina Hwy, Winnipeg, MB, Canada 1 year ago • details 267 Suspected food poisoning. Symptoms: Diarrhea, Stomach Pain, Cramps Suspected source: Mcdonalds chocolate milkshake Onset: Less than 4 hours Duration: 12 to 24 hours Sick: 2 people Additional information: one person also with nausea