1. INHIBIT HORMONE SYNTHESIS (ANTITHYROID DRUGS)
Propylthiouracil
Methimazole
Carbimazole
2. INHIBIT IODIDE TRAPPING (IONIC INHIBITORS)
Thiocyanates (–SCN)
Perchlorates (–ClO4)
Nitrates (–NO3)
3. INHIBIT HORMONE RELEASE
Iodine
Iodides of Na and K
Organic iodide
4. DESTROY THYROID TISSUE
Radioactive iodine (131I, 125I, 123I)
THYROID INHIBITORS