Generic Name and Formulations:
Thyroid 15mg (¼ grain), 30mg (½ grain), 60mg (1 grain), 90mg (1 + ½ grain), 120mg (2 grains), 180mg (3 grains)+, 240mg (4 grains), 300mg (5 grains)+; tabs; +scored. Each grain of thyroid contains liothyronine (T3) 9mcg and levothyroxine (T4) 38mcg.
Hypothyroidism: initially 30mg daily (long-standing myxedema: initially 15mg daily); increase by 15mg every 2–3 weeks; usual maintenance: 60–120mg daily. Myxedema coma: see literature.
Hypothyroidism: <6months: 4.8–6mg/kg daily. 6–12months: 3.6–4.8mg/kg daily; 1–5yrs: 3–3.6mg/kg daily; 6–12yrs: 2.4–3mg/kg daily; ≥12yrs: 1.2–1.8mg/kg daily.
Uncorrected adrenocortical insufficiency. Untreated thyrotoxicosis.
Not for treatment of obesity. Cardiovascular disease, angina, elderly: use lower initial dose. Adrenocortical insufficiency. Monitor for craniosynostosis in infants. Pregnancy (Cat.A). Nursing mothers.
Monitor oral anticoagulants, hypoglycemics. Estrogens affect thyroid function tests. Toxicity with large doses of sympathomimetics (e.g., anorectics).
T3 and T4 (porcine derived).
Hyperthyroidism, transient hair loss in children.
Tabs 15mg, 90mg, 240mg, 300mg—100; 30mg, 120mg, 180mg—100, 1000; 60mg—100, 1000, 5000
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