Nursing Acceleration Challenge Exam (NACE) PN-RN Practice Test

Which symptom may indicate digoxin toxicity?

1. Bradycardia.

2. Colored or halo vision.

3. Constipation.

4. Dry mouth.

The correct answer is: Colored or halo vision.

While colored or halo vision can indeed indicate digoxin toxicity, bradycardia is often cited as a classic and direct sign of this toxicity. Digoxin works by affecting the heart's electrical system and can lead to a decrease in heart rate with toxicity. Patients might experience bradycardia as the drug accumulates to toxic levels, resulting in heart rhythm disturbances. Halo vision, or seeing colored halos around objects, is also associated with digoxin toxicity; however, it is less directly related to the immediate physiological effects of the medication compared to bradycardia. The other symptoms mentioned—constipation and dry mouth—are more common side effects of digoxin but do not directly indicate toxicity. They are not specific indicators and could arise from other causes unrelated to digoxin levels.