A student nurse asks her study group how to define a drug allergy. What would be the peer group's best response?
A) A second effect of the body to a specific drug
B) The formation of antibodies to a drug protein causing an immune response when the person is next exposed to that drug.
C) A serum sickness caused by a reaction to a drug
D) Immediate systemic reaction to the drug when exposed to the drug the first time.
B
Feedback:
A drug allergy is the formation of antibodies to a drug or drug protein; causes an immune response when the person is next exposed to that drug. A drug allergy does not occur at the first exposure to a drug. A second action of a specific drug is an adverse response that the drug causes in addition to the therapeutic effect. Serum sickness is one type of allergic reaction but does not define allergic reaction. An immediate systemic reaction to a drug, usually not on first exposure, is an anaphylactic reaction.
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