Psychiatric Technician Practice Exam 2026 - Free Practice Questions and Study Guide

A severe allergic reaction, known as anaphylaxis, can manifest through various critical symptoms that necessitate immediate medical attention. The symptom of edema of the pharynx and larynx is particularly alarming because it indicates swelling that can obstruct the airway, making it difficult to breathe. This symptom is a hallmark of a severe reaction and can lead to life-threatening consequences if not addressed right away.

In contrast, while hives and rash may denote an allergic reaction, they are typically associated with less severe responses. Symptoms such as dry mouth, nausea, headache, and dizziness are more general and can be caused by various factors, including medications, but they don’t indicate a severe allergic response. Recognizing the severity of symptoms is crucial in managing allergic reactions effectively and ensuring patient safety. Therefore, edema of the pharynx and larynx stands out as a critical red flag that signifies a medical emergency.