A nurse is preparing to administer ondansetron (Zofran) to a client. For which of the following adverse effects of ondansetron should the nurse monitor? (Select All that Apply)

A. Repeating instructions: Repeating instructions can reinforce learning but does not guarantee that the patient has correctly understood or can apply the instructions. It does not provide an opportunity for the nurse to observe and correct errors.
B. Assessing lung sounds: Assessing lung sounds helps evaluate the effectiveness of the inhaled medication but does not verify whether the patient is using the inhaler correctly.
C. Return demonstration: A return demonstration involves the patient showing the nurse how they use the inhaler. This allows the nurse to observe the technique and provide immediate feedback and correction, ensuring proper use.
D. Answering questions: Answering questions can clarify doubts and enhance understanding, but it does not confirm that the patient is correctly using the inhaler.

A. Cetirizine (Zyrtec): Cetirizine is an antihistamine used to treat mild allergic reactions, such as seasonal allergies or mild hives. It is not the treatment of choice for severe allergic reactions like anaphylaxis, which this patient may be experiencing given the symptoms and history of peanut allergy.
B. Diphenhydramine (Benadryl): Diphenhydramine is an antihistamine that can be used for mild to moderate allergic reactions, including urticaria and mild anaphylaxis. While it may be part of anaphylactic treatment, it is not the primary treatment for severe symptoms like difficulty breathing.
C. Guaifenesin: Guaifenesin is an expectorant used to relieve chest congestion and make coughs more productive. It is not appropriate for treating allergic reactions or respiratory distress related to anaphylaxis.
D. Epinephrine: Epinephrine is the first-line treatment for anaphylaxis, which is a severe and potentially life-threatening allergic reaction. It works by rapidly reducing airway swelling, improving breathing, and stabilizing blood pressure. Given the patient's symptoms and history of peanut allergy, epinephrine is the most appropriate medication.