Which item is not a symptom of immediate hypersensitivity?

Immediate hypersensitivity, often referred to as an allergic reaction, typically includes symptoms that are related to the release of histamine and other chemicals from mast cells and basophils. Common manifestations of immediate hypersensitivity include sneezing, itchy eyes, a drippy nose, and other respiratory symptoms such as asthma.

Cramps and headaches can sometimes be associated with the stress or discomfort that accompanies severe allergic reactions, but they are not classic symptoms specifically tied to immediate hypersensitivity. Blurred vision can occur due to various factors, such as increased pressure or swelling in the eyes, but it is not a typical symptom of immediate hypersensitivity either.

The correct answer identifies that blurred vision is not commonly recognized as a symptom of immediate hypersensitivity, making it distinct from the others listed, which more closely relate to typical allergic responses.