Which of the following actions is most appropriate if a patient on Digoxin reports vision changes?

• A. Ignore as it is unlikely related to Digoxin
• B. Advise the patient to rest and retake the dose later
• C. Instruct to report immediately to the clinician
• D. Resume dosing only after Potassium normalizes

Answer: (C)

Digoxin has a very narrow therapeutic window, so signs of toxicity can appear quickly. Vision disturbances, such as blurred vision or seeing yellow or green halos, are a classic warning sign of digoxin toxicity. When a patient on digoxin reports vision changes, the correct course is to have them contact a clinician immediately. Prompt evaluation is essential because the clinician may hold the medication, check the digoxin level, assess kidney function and electrolyte status (especially potassium), and determine the safest next steps. This reduces the risk of progression to more serious toxicity and dangerous heart rhythms.

Ignoring the symptom or delaying evaluation is not appropriate, and simply resting or retaking the dose later could allow toxicity to worsen. Resuming dosing after potassium normalizes assumes a safe correction without medical guidance, which is not reliable enough when vision changes are involved.