Ace the Ontario Paramedic Practice Exam 2026 – Sprint to Success and Save Lives!

During an allergic reaction, the body's immune system responds to a substance that it perceives as harmful. This can lead to inflammation and irritation in various parts of the body, including the gastrointestinal (GI) tract. The typical presentations of an allergic reaction in the GI tract include cramping, nausea, vomiting, and diarrhea. These symptoms can occur shortly after coming into contact with the allergen and may persist for a few hours or days.

Options A, C, and D are incorrect because they list symptoms that are not common during an allergic reaction. PUD, or peptic ulcer disease, is a condition that causes ulcers in the stomach and small intestine. Constipation and flatulence are not typically associated with an allergic reaction, unless they are symptoms of an underlying condition that is triggered by the allergen. Rectal bleeding, abdominal distension, and gallstones are also not commonly associated with an allergic reaction. Gastroenteritis, GERD, and dysphagia are all conditions that can cause gastrointestinal symptoms, but they are not specific to an allergic reaction.

Therefore, the best answer is B because it lists the most typical and common GI presentations during an allergic reaction.