Congestive Heart Failure Home > Digoxin Levels

If you have congestive heart failure or atrial fibrillation, your healthcare provider may prescribe digoxin (Lanoxin®). Your dosage of this medication will be determined by several factors, including other medical conditions you may have and other medications you are taking. Your healthcare provider may adjust your dose (no more often than every two weeks) based on how you respond to the medication and your digoxin blood level. But what are normal blood levels for this medication?
 
Blood levels between 0.5 and 2 ng per mL are considered normal therapeutic levels. However, based on the results from clinical studies, the target digoxin blood level for effectively treating heart failure is between 0.5 and 1 ng per mL. Most people will likely be maintained on a digoxin dosage between 0.125 mg and 0.25 mg to achieve this level. If levels exceed 2 ng per mL, digoxin toxicity is likely to occur.
 
(For more information on digoxin blood levels, click Digoxin Dosage. This Web article also provides an in-depth look at dosing guidelines for treating congestive heart failure or atrial fibrillation in adults and children, along with important tips on how to take this drug.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
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