Blood tests for digoxin are performed to measure the levels of this drug in the blood. Digoxin is a drug used to treat certain heart conditions, such as congestive heart failure and certain heart rhythm disorders. Monitoring the blood levels of digoxin is essential to ensure that the drug is used effectively and safely.
Digoxin has a narrow therapeutic window, meaning that the distance between the therapeutic dose and the toxic dose are relatively small. Therefore, a blood test can help detect early signs of toxicity, such as changes in the electrical activity of the heart (ECG changes) and other side effects such as nausea, vomiting and visual disturbances.