<prompt> Which of the following drug doesnt act on thyroid-PropranololPropylthiuracilSodium iodideThiocyanote  <response>: Ans. is a i.e., Propranolol Thyroid inhibitorsInhibit hormone synthesis antithyroid drugso Propylthiouracilo Methimazoleo CarbimazoleInhibit iodine trapping ionic inhibitorso Thiocyanateso Perchlorateso NitratesInhibit hormone releaseo Iodineo NaIo KIDestroy thyroid tissueo Radioactive iodineo Propranolol inhibits peripheral conversion of T4 and T3 in blood but it does not act on thyroid gland. 