patients with thyrotoxic graves ' disease were treated daily for 10 d with 1 g sodium ipodate , an iodine rich x-ray contrast agent which impairs outer ring ( 5'- ) deiodination of t4 to t3 , or with 12 drops of a saturated solution of potassium iodide ( sski ) .
C0021966
iodine
C0032831
potassium iodide