Pharmacology and the Nursing Process Test Bank Free Related

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The nurse understands that an anaphylactic reaction is considered which of the following types of hypersensitivity reactions?

  • A. Type I
  • B. Type III
  • C. Type II
  • D. Type IV
Correct Answer: A

Rationale: The correct answer is A: Type I hypersensitivity reaction. In Type I hypersensitivity, anaphylactic reactions involve immediate IgE-mediated responses to allergens, leading to histamine release and potentially life-threatening symptoms. This type of reaction is characterized by rapid onset and systemic involvement. Choices B, C, and D are incorrect because Type III reactions involve immune complex deposition leading to inflammation (B), Type II reactions involve cytotoxic antibodies targeting cells (C), and Type IV reactions involve delayed cell-mediated responses (D).