A nurse is reinforcing teaching with a client who has a new prescription for epinephrine auto-injector PRN. The nurse should reinforce with the client that the medication can help treat which of the following manifestations?

Rationale: A. Swelling of the lips: Swelling of the lips can be an early sign of anaphylaxis, a severe allergic reaction. Epinephrine is the first-line treatment for anaphylaxis because it rapidly reduces airway swelling, improves breathing, and supports blood pressure by constricting blood vessels. B. Nausea: While nausea may occur during an allergic reaction, it is not a primary life-threatening symptom addressed by epinephrine. Epinephrine targets cardiovascular and respiratory symptoms more directly, not gastrointestinal discomfort. C. Hand tremors: Tremors are actually a potential side effect of epinephrine due to its stimulation of the sympathetic nervous system. The medication is not intended to treat tremors and may even cause or worsen them temporarily. D. Hyperglycemia: Epinephrine can increase blood glucose levels as a side effect, but it is not prescribed to treat or manage hyperglycemia. Managing blood glucose is not part of the therapeutic purpose of this emergency medication.