When caring for a patient taking digoxin, what level indicates the medication is within the therapeutic range?

The therapeutic range for digoxin is crucial for ensuring the medication's effectiveness while minimizing the risk of toxicity. A level within the range of 0.5 to 0.8 ng/mL is considered optimal for therapeutic use. Within this range, digoxin effectively enhances cardiac contractility and controls heart rate in conditions such as atrial fibrillation and heart failure.

Maintaining digoxin levels within this specific range allows for the desired pharmacological effects without approaching levels that can lead to toxicity. Levels below this range may be insufficient for treatment, while levels above this range increase the risk of adverse effects, illustrating the importance of monitoring plasma digoxin levels closely.