Evaluation of Safety and Efficacy of Intravenous Digoxin Loading Doses Based on Ideal Body Weight.

This article focuses on comparing the safety and efficacy of intravenous (IV) digoxin loading doses based on ideal body weight (IBW) in patients with atrial fibrillation or atrial flutter. In a retrospective cohort study of 244 patients, those receiving >12 µg/kg IBW of digoxin had significantly higher rates of serum digoxin concentrations (SDCs) ≥1.2 ng/mL—a level associated with increased mortality—compared to those receiving ≤12 µg/kg IBW, while both groups showed similar efficacy in rate control. The findings suggest that weight-based dosing using 8 to 12 µg/kg IBW may be safer than commonly used fixed-dose regimens, which often result in higher digoxin exposure. Limitations include the study's retrospective design, potential selection bias, and inability to assess all confounding factors.