An inmate begins experiencing anaphylaxis after receiving a penicillin injection. After calling for emergency assistance, what is the nurse's immediate priority action?
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A
Administer oral diphenhydramine
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B
Administer epinephrine 1:1000 via intramuscular injection
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C
Start an IV line for fluid resuscitation
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D
Apply oxygen via nasal cannula at 2 L/min