Final answer:
Hold the dose of Digoxin and notify the physician due to a toxic level of 5 ng/mL, even though the potassium level is also low.
Step-by-step explanation:
A patient is taking Digoxin and has an apical pulse of 61 bpm, with lab values showing a K+ level of 3.3 and a high Digoxin level of 5 ng/mL. The correct nursing action would be to hold the dose and notify the physician of the Digoxin level (option C) because a Digoxin level of 5 ng/mL is usually considered toxic. Normal therapeutic levels of Digoxin are typically between 0.5 and 2 ng/mL. The low potassium level can increase the risk of Digoxin toxicity; however, treating Digoxin toxicity is the immediate priority, hence notification of the physician is imperative.