Amiodarone 

Amiodarone remains a highly effective drug capable of treating life threatening arrhythmias. Not only does Amiodarone reduce the risk of ventricular rhythm disturbance, but it also appears effective in combating atrial fibrillation.
While Amiodarone successfully combats a variety of heartbeat irregularities, it may precipitate a series of cardiac problems especially in those with low levels of potassium, magnesium or calcium.
Unfortunately Amiodarone commonly causes a wide array of adverse events some of which may be quite serious or even fatal. Amiodarone negatively affects the lungs, eyes and the skin where it leads to a peculiar grayish discoloration that may be remain long after discontinuing the drug. Amiodarone contains an enormous amount of iodine which often culminates in either overactive or underactive thyroid gland activity.
People receiving Amiodarone must maintain close contact with their physicians for regular examinations.