Final answer:
The nurse should identify vomiting as a manifestation of digoxin toxicity.
Step-by-step explanation:
Digoxin toxicity can manifest in various ways, but in this case, the nurse should identify vomiting as a manifestation of digoxin toxicity. Other signs of digoxin toxicity can include nausea, diarrhea, and changes in blood pressure and heart rate. It is important for the nurse to monitor the client closely for these symptoms and report them to the healthcare provider.