Two years later, Sam attends her endocrinologist complaining of a low-grade fever, arthralgias, and sore throat. Dr. Raj discontinues methimazole immediately. 

Once Sam recovers with appropriate treatment, Dr. Raj discusses her options and recommends that she undergoes treatment with radioactive iodine. Dr. Raj informs her that she will most likely need life-long thyroid replacement therapy afterwards. 

Which drug would Sam be most likely prescribed for this indication?