The thyroid inhibitor which produces the fastest response is: (A) Lugol's iodine, (B) Propylthiouracil, (C) Radioactive iodine, (D) Lithium carbonate
Answer is A. IODINE AND IODIDES Though iodine is a constituent of thyroid hormones, it is the fastest acting thyroid inhibitor. Ref:- kd tripathi; pg num:-254