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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Mechanism of action of prophylthiouracil -
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The correct answer is  Ans. is 'd' i.e., Inhibits coupling o Propylthiouracil blocks thyroxine synthesis by inhibiting thyroid peroxidase, and preventing oxidation of iodide/ iodotyrosyl residues, there by1) Inhibit iodination of tyrosine residue in thyroglobulin.2) Inhibit coupling of MIT and DIT to form T3 & T4.o Propylthiouracil also inhibit the peripheral conversion of T4 to T3