B. Antithyroid drugs a 2. Clinical uses ()Non-operative therapy of hyperthyroidism: latent period .(2) Preoperative therapy of hyperthyroidism: com bined with iodide -(3) Thyrotoxic crisis: combined with larger dose of iodide, propylthiouracil a 3. Adverse effects ()agranulocytosis(0.2%) .(2) Hypersensitivity 3)GI reactions§