Today’s question targets safe medication administration and rapid recognition of adverse drug effects. This matters in real nursing because patients often show early warning signs before a serious complication develops. A nurse who notices the pattern, understands the medication, and acts quickly can prevent harm.
Clinical Scenario
You are caring for a 68-year-old man on a medical-surgical unit. He was admitted 2 days ago with new-onset atrial fibrillation with rapid ventricular response. His history includes hypertension, chronic kidney disease stage 3, and type 2 diabetes. This morning he received his scheduled dose of digoxin 0.125 mg by mouth. Two hours later, he tells the nurse, “I feel sick to my stomach, and the lights look strange.”
On assessment, he is alert but mildly weak. Vital signs are: temperature 98.4 F, blood pressure 104/62 mm Hg, heart rate 52/min and irregular, respiratory rate 18/min, oxygen saturation 97% on room air. Telemetry shows atrial fibrillation with a slow ventricular response. The morning basic metabolic panel shows potassium 3.1 mEq/L and creatinine 1.9 mg/dL.
The Question
What is the nurse’s priority action?
Answer Choices
- A. Administer the next scheduled dose of digoxin with food to reduce nausea
- B. Notify the provider of suspected digoxin toxicity and hold further digoxin
- C. Encourage oral fluids and reassess the patient in 1 hour
- D. Place the patient flat in bed and prepare for immediate synchronized cardioversion
Correct Answer
B. Notify the provider of suspected digoxin toxicity and hold further digoxin
Detailed Rationale
This patient has several findings that point to possible digoxin toxicity: nausea, visual changes, weakness, bradycardia, and an irregular rhythm. Those symptoms matter because digoxin has a narrow therapeutic range. Small increases in drug level, or changes in kidney function and electrolytes, can turn a routine dose into a dangerous one.
The biggest clue is the combination of symptoms plus risk factors. He reports nausea and “strange” vision, which are classic early signs. His heart rate is 52/min, which is too slow for a patient receiving digoxin unless there is a clear reason and close monitoring. He also has chronic kidney disease, and digoxin is cleared by the kidneys. Reduced kidney function can raise the drug level even when the prescribed dose seems standard.
His potassium is 3.1 mEq/L, which is low. Low potassium increases the effects of digoxin on the heart and raises the risk of toxicity. This is why the potassium value is not just a lab detail. It helps explain why the patient is now symptomatic and why the nurse should take the situation seriously.
The nurse’s priority is to stop further exposure and escalate care. Holding digoxin prevents another dose from worsening bradycardia or triggering a more dangerous dysrhythmia. Notifying the provider is needed so the team can order the next steps, which may include a digoxin level, repeat electrolyte testing, potassium replacement, closer cardiac monitoring, and treatment if severe toxicity is confirmed.
What should the nurse assess right now? Recheck apical pulse, blood pressure, mental status, and telemetry rhythm. Ask more about the visual changes and gastrointestinal symptoms. Review the medication list for other drugs that can raise digoxin levels or lower potassium. Confirm renal function trends, not just one creatinine value, because worsening kidney function changes drug clearance.
What should the nurse do next after holding the medication and calling the provider? Continue cardiac monitoring, maintain patient safety, and watch for worsening bradycardia, new conduction problems, increasing weakness, vomiting, or confusion. If ordered, obtain labs promptly and replace potassium carefully. In a patient with kidney disease, electrolyte correction must be done thoughtfully because overcorrection can also cause harm.
The main nursing judgment here is pattern recognition. A low heart rate alone might not tell the whole story. Nausea alone could have many causes. But when a patient on digoxin develops nausea, visual changes, bradycardia, low potassium, and impaired renal function, the safest action is to suspect toxicity until proven otherwise.
Why the Other Options Are Wrong
A. Administer the next scheduled dose of digoxin with food to reduce nausea
This is unsafe. Food may reduce stomach upset in some cases, but it does not address toxicity. The patient already shows red flags that require the drug to be held, not given again.
C. Encourage oral fluids and reassess the patient in 1 hour
This delays treatment. Reassessment is important, but waiting is risky when the patient has bradycardia and signs of a medication-related cardiac problem. Oral fluids also do not fix the immediate issue.
D. Place the patient flat in bed and prepare for immediate synchronized cardioversion
Cardioversion is not the first response for a stable patient with suspected digoxin toxicity and a slow ventricular rate. The patient is not described as hemodynamically unstable. In fact, cardioversion can be dangerous in digoxin toxicity because it may trigger more serious dysrhythmias.
Key Takeaways
- Digoxin toxicity often shows up first as nausea, vomiting, visual changes, weakness, and bradycardia.
- Low potassium makes digoxin more dangerous because it increases the drug’s effect on the heart.
- Poor kidney function raises toxicity risk because digoxin is cleared renally.
- If toxicity is suspected, hold digoxin, assess the patient, monitor rhythm, and notify the provider promptly.
- Do not treat the symptom alone. Look for the cause, especially when a medication has a narrow safety range.
- On-shift mini-checklist: Check apical pulse before digoxin, review potassium and creatinine, ask about nausea or vision changes, verify rhythm on telemetry, and hold the drug if findings suggest toxicity.
Quick Practice Extension
1. A patient taking digoxin has an apical pulse of 58/min before the scheduled dose but denies symptoms. What additional information would help you decide the safest next step?
2. A patient on digoxin also takes a loop diuretic. What assessment findings and lab trends would make you most concerned during your shift?
Category: Pharmacology
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