A patient taking Digoxin has severe bradycardia, nausea, and vomiting, with a Digoxin level of 4 ng/mL. What medication would the physician order?

• A. Narcan
• B. Aminophylline
• C. Digibind
• D. No medication because this is a normal level.

Answer: (C)

Digoxin toxicity is suspected when there are prominent GI symptoms like nausea and vomiting along with bradycardia, and a serum digoxin level well above the therapeutic range. The treatment of choice in this situation is digoxin-specific antibody fragments (Digibind). These antibody fragments bind free digoxin in the bloodstream, forming inactive complexes that are cleared by the kidneys. By neutralizing digoxin, they rapidly reverse the drug’s effects on the heart and other tissues, which is crucial when severe bradycardia and toxicity symptoms are present.

Knowing what each option would do helps connect the concept: Narcan reverses opioids, not digoxin. Aminophylline has limited or historical use in certain arrhythmias but is not the standard antidote for digoxin toxicity. Not giving any medication would leave the toxicity unmanaged despite the high risk. The key idea is that the antidote directly targets and neutralizes digoxin, which is essential when toxicity is evident and the level is elevated.