Digoxin is a drug that has been used for several centuries to treat arrhythmias, extracted from the foxglove plant Digitalis lanata. It is used in the management of rapid persistent or permanent atrial fibrillation and occasionally cardiac failure.

Mechanism of action

Digoxin acts on the atrioventricular node slowing down conduction of electrical impulses to the ventricles.

Potential side-effects

Common side effects of digoxin include: nausea, diarrhoea, dizziness, headache and weakness. Rarely digoxin can accumulate and cause digoxin toxicity. The main signs of this medical emergency are: a slow heart rate, confusion, blurred or yellow vision.  Your doctor may monitor blood Digoxin levels routinely in order to avoid this.