Oral Amiodarone Loading Dose for Elderly Males

Standard Loading Regimen

The American College of Cardiology recommends an initial loading dose of 600-800 mg daily in divided doses for atrial fibrillation or less severe ventricular arrhythmias in elderly males 1, 2
The loading dose should be continued until a total of 10 grams has been administered, typically over 2-4 weeks 1, 2
For life-threatening ventricular arrhythmias, a higher loading dose of 800-1600 mg daily may be used, but this increases the risk of adverse effects 2

Bradycardia and heart block are more common with amiodarone in elderly patients, particularly in women, and may require permanent pacemaker implantation 1

A structured approach to loading in elderly males involves 600 mg daily in divided doses for the first week, followed by 600-800 mg daily until 10 grams total administered 1, 2
After loading is complete, the maintenance dose should be 200-400 mg daily 1, 2

The American College of Cardiology recommends monitoring heart rate at weekly intervals during the loading phase 1
Baseline and serial thyroid studies are mandatory, given the risk of hypothyroidism in elderly patients 3
Liver transaminases should be checked at baseline and during loading, as elevations are usually mild and transient 3
Patients should be assessed for bradycardia, QT prolongation, and heart block at each visit 3, 2
Rate-controlling medications should be reduced or discontinued as amiodarone takes effect to prevent excessive bradycardia 1

The American Family Physician recommends reducing digoxin dose by 50% when starting amiodarone, as levels predictably double 3
Warfarin dose should be reduced and INR monitored at least weekly during the first 6 weeks, as peak interaction effects occur at 7 weeks 3, 1
Grapefruit and grapefruit juice should be avoided, as they inhibit conversion to active metabolites 3

Amiodarone should not be initiated in patients with baseline bradycardia or heart block without a pacemaker 3
Alternative agents should be considered in patients with severe hepatic dysfunction 3
Baseline chest radiograph and pulmonary function tests are essential before loading in patients with pre-existing pulmonary disease 3