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?

A. Hyperglycemia: Epinephrine is not indicated for elevated blood glucose. Its primary pharmacologic action is vasoconstriction and bronchodilation, not glucose regulation. Hyperglycemia would not be treated with an auto-injector. B. Swelling of the lips: Swelling of the lips is a sign of angioedema, which can occur during severe allergic reactions or anaphylaxis. Epinephrine rapidly reduces airway edema, improves perfusion, and alleviates life-threatening allergic manifestations. C. Hand tremors: Tremors are a common side effect of epinephrine due to beta-adrenergic stimulation, not a symptom it treats. Administering epinephrine would likely exacerbate tremors rather than relieve them. D. Nausea: Nausea may accompany allergic reactions but is not the primary indication for epinephrine use. The medication targets hypotension, airway constriction, and vascular permeability rather than gastrointestinal symptoms alone.