Drug prescribed after rhythm disturbance presents many risks

A 61-year-old man was prescribed amiodarone after doctors treated a severe episode of ventricular tachycardia, a dangerously fast heart rhythm. He received an implantable cardioverter-defibrillator and was discharged on the medication, which can cause serious side effects affecting the lungs, liver, thyroid and vision. The patient asks how common these risks are and whether alternatives may be available.