All content on Lab Tests Online has been reviewed and approved by our Editorial Review Board.
At a Glance
Why Get Tested?
To determine if the concentration of digoxin in your blood is at a therapeutic level or to detect toxic levels of the drug
When to Get Tested?
After the start of digoxin therapy and at regular intervals to ensure that drug levels are within therapeutic range (not too low or too high as to be toxic)
A blood sample drawn from a vein in your arm
Test Preparation Needed?
No special preparation is needed, but timing of sample collection is important. When having your blood drawn, tell the person taking your sample when you took your last dose of digoxin.