Clinical Medical Assistant Certification Exam Practice Question

Correct Answer: E

Rationale: In the context of allergy injections, the most serious adverse effect involves systemic reactions. Wheezing and light-headedness indicate potential anaphylaxis, a life-threatening condition requiring immediate intervention.

Erythematous wheal (A) and pruritus at the injection site (B) are common, mild reactions that typically resolve without treatment. Sneezing (C) is also a mild symptom, often associated with local irritation rather than a serious reaction. Ulceration at the injection site (D) can occur but is generally not life-threatening. Recognizing severe reactions like wheezing and light-headedness is crucial for patient safety.