An anesthesia pain service consult is sought for a 78-year-old with trigeminal nerve–distribution pain who also has congestive heart failure on digoxin and thiazide. In addition to the chief complaint, over the last 72 hours the patient has dysesthesia in the feet, vision changes, and emesis. What is the most appropriate next step?

An anesthesia pain service consult is sought for a 78-year-old with trigeminal nerve–distribution pain who also has congestive heart failure on digoxin and thiazide. In addition to the chief complaint, over the last 72 hours the patient has dysesthesia in the feet, vision changes, and emesis. What is the most appropriate next step?

• A. Trigeminal nerve block with bupivacaine
• B. Obtain neurologic workup for multiple sclerosis
• C. Administration of fentanyl and ondansetron
• D. Obtain a digoxin level

Answer: (D)

The main issue is digoxin toxicity. In an older patient taking digoxin for heart failure who also uses a thiazide, new systemic symptoms—dysesthesia, vision changes (often color disturbances or blurred/yellow vision), and vomiting—fit classic digoxin toxicity rather than a new facial pain syndrome. Thiazide diuretics can cause hypokalemia, which raises the risk of digoxin toxicity, so the combination is particularly concerning in the elderly. The most appropriate next step is to obtain a serum digoxin level (along with basic electrolytes andkidney function). This helps confirm whether toxicity is present and guides management. If the level is elevated, treatment focuses on removing or neutralizing the drug and correcting electrolytes; in severe cases, digoxin-specific antibody fragments may be indicated. While supportive measures like analgesia or antiemetics can help symptoms, they don’t address the underlying toxicity and could delay appropriate treatment.

The main issue is digoxin toxicity. In an older patient taking digoxin for heart failure who also uses a thiazide, new systemic symptoms—dysesthesia, vision changes (often color disturbances or blurred/yellow vision), and vomiting—fit classic digoxin toxicity rather than a new facial pain syndrome. Thiazide diuretics can cause hypokalemia, which raises the risk of digoxin toxicity, so the combination is particularly concerning in the elderly.

The most appropriate next step is to obtain a serum digoxin level (along with basic electrolytes andkidney function). This helps confirm whether toxicity is present and guides management. If the level is elevated, treatment focuses on removing or neutralizing the drug and correcting electrolytes; in severe cases, digoxin-specific antibody fragments may be indicated. While supportive measures like analgesia or antiemetics can help symptoms, they don’t address the underlying toxicity and could delay appropriate treatment.