A nurse is caring for a client who has congestive heart failure and is taking Digoxin daily. The client refused breakfast and is complaining of nausea, weakness, and visual disturbances. Which of the following actions should the nurse take first?

A. Request an order for an antiemetic: Although nausea is a symptom of digoxin toxicity, administering an antiemetic may mask a serious underlying problem. It should not be the first intervention without further assessment of the client’s condition. B. Check the client's vital signs: Digoxin toxicity can cause bradycardia, hypotension, and arrhythmias. The client's symptoms (nausea, weakness, and visual disturbances) are classic signs of digoxin toxicity. Assessing vital signs is the priority to determine if there is immediate hemodynamic instability, which would guide further urgent interventions. C. Suggest that the client rests before eating the meal: Fatigue may be related to digoxin toxicity or underlying heart failure, but suggesting rest delays necessary clinical assessment and does not address the potentially serious symptoms. D. Request a dietitian consult: While nutrition is important for clients with CHF, the presence of nausea, weakness, and visual disturbances suggests possible digoxin toxicity, which requires immediate clinical evaluation not dietary consultation.