What digoxin level is considered toxic?

What digoxin level is considered toxic?

• A. 2.0-2.5
• B. Greater than 3.0
• C. 1.5-2.0
• D. Greater than 2.5

Answer: (D)

Digoxin has a very narrow therapeutic window. The goal is to keep serum levels roughly between 0.5 and 2.0 ng/mL to avoid toxicity while still providing benefit. As levels rise beyond this range, the chance of toxicity increases, with symptoms like nausea, vomiting, fatigue, confusion, visual disturbances, and potential dangerous heart rhythms. In many nursing references and practice questions, toxicity is defined when the level exceeds about 2.5 ng/mL. That’s why the best answer here is the option stating greater than 2.5. Levels above 3.0 ng/mL signal a high risk of severe toxicity, but the threshold most often used to indicate toxicity starts around >2.5 ng/mL. The other ranges either fall within the therapeutic window or don’t align with the commonly cited toxic cutoff.

Digoxin has a very narrow therapeutic window. The goal is to keep serum levels roughly between 0.5 and 2.0 ng/mL to avoid toxicity while still providing benefit. As levels rise beyond this range, the chance of toxicity increases, with symptoms like nausea, vomiting, fatigue, confusion, visual disturbances, and potential dangerous heart rhythms.

In many nursing references and practice questions, toxicity is defined when the level exceeds about 2.5 ng/mL. That’s why the best answer here is the option stating greater than 2.5. Levels above 3.0 ng/mL signal a high risk of severe toxicity, but the threshold most often used to indicate toxicity starts around >2.5 ng/mL. The other ranges either fall within the therapeutic window or don’t align with the commonly cited toxic cutoff.