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Cordarone tablet is used for many serious arrhythmias of the heart including ventricular fibrillation, ventricular tachycardia, atrial fibrillation, and atrial flutter.

Cordarone injection is an antiarrhythmic agent indicated for initiation of treatment and prophylaxis of frequently recurring ventricular fibrillation (VF) and hemodynamically unstable ventricular tachycardia (VT) in patients refractory to other therapy.


Amiodarone Hydrochloride is used to correct abnormal rhythms of the heart. Amiodarone is considered a "broad spectrum" antiarrhythmic medication. The most important electrical effects of the drug includes : a delay in the rate at which the heart’s electrical system "recharges" after the heart contracts (repolarisation); a prolongation in the electrical phase during which the heart’s muscle cells are electrically stimulated (action potential); a slowing of the speed of electrical conduction (how fast each individual impulse is conducted through the heart’s electrical system); a reduction in the rapidity of firing of the normal generator of electrical impulses in the heart (the heart’s pacemaker); and a slowing of conduction through various specialised electrical pathways (called accessory pathways). In addition to being an antiarrhythmic medication, Amiodarone also causes blood vessels to dilate. Because of this effect it also may be of benefit in patients with  congestive heart failure. This effect can result in drop of blood pressure.

Dosage & Administration

Tablet: 200 mg 3 times daily for 1 week reduced to 200 mg twice daily or the minimum required to control arrhythmia. Amiodarone is usually given in several daily doses to minimize stomach upset which is seen more frequently with higher doses. For this same reason, it is also recommended that Amiodarone should be taken with meals.

Injection: The recommended starting dose is about 1000 mg over the first 24 hours of therapy, delivered by the following infusion regimen:
  • Initial Load: 150 mg per 100 mL (in D5W or Normal Saline) infused over 10 minutes
  • Followed by: 1 mg/min for 6 hours
  • Followed by: 0.5 mg/min thereafter
In the event of breakthrough episodes of VF or hemodynamically unstable VT: Repeat the Initial Load described above as needed (infused over 10 minutes). Increase the rate of maintenance infusion to achieve effective arrhythmia suppression.


Cordarone may interact with b blockers such as Atenolol, Propranolol, Metoprolol, or certain calcium channel blockers, such as Verapamil or Diltiazem, resulting in an excessively slow heart rate. Cordarone increases the blood levels of Digoxin when the two drugs are given together. Flecainide blood concentrations increase by more than 50% with Cordarone. Procainamide and Quinidine concentrations increase by 30-50% during the first week of Cordarone therapy. Cordarone also can interact with tricyclic antidepressants (TCA). Cordarone interacts with Warfarin and increases the risk of bleeding. Cordarone inhibits the metabolism of Dextromethorphan.


Amiodarone is contraindicated in patients with cardiogenic shock; severe sinus-node dysfunction, causing marked sinus bradycardia; second- or third degree atrioventricular block; and when episodes of bradycardia have caused syncope (except when used in conjunction with a pacemaker). Amiodarone is contraindicated in patients with a known hypersensitivity to the drug or to any of its components, including iodine.

Side Effects

The most severe side effects of Cordarone therapy are related to the lungs. These reactions can be fatal. Patients should report any symptoms of cough, fever, or painful breathing. Although quite rare, fatal liver toxicity may occur with Cordarone therapy. Reversible corneal microdeposits (sometimes with night glare), rarely impaired vision due to optic neuritis; peripheral neuropathy and myopathy (usually reversible on withdrawal); bradycardia and conduction disturbances; phototoxicity and rarely persistent skin discolouration; hypothyroidism, hyperthyroidism; raised serum transaminases; jaundice, hepatitis and cirrhosis are reported. Other rare complaints are nausea, vomiting, metallic taste, tremor, sweating, vertigo, headache, sleeplessness, fatigue, alopecia, benign raised intracranial pressure, ataxia, rashes, vasculitis, renal involvement, thrombocytopenia, haemolytic or aplastic anaemia. In some cases, dose of Cordarone may be reduced. In other cases, Cordarone therapy may need to be stopped.

Pregnancy & Lactation

In general, Amiodarone should not be administered during pregnancy because there have been reports of hypo or hyperthyroidism in infants from oral Amiodarone use during pregnancy. If Amiodarone use is considered essential, however, the patient should be warned of the risk to the foetus. The safe use of Amiodarone in lactating women has not been established.

Therapeutic Class

Potassium channel blockers

Storage Conditions

Keep below 30°C temperature, away from light & moisture. Keep out of the reach of children.