藥品參考
Methimazole
Methimazole is a medicine in the class endocrine. It is used for graves disease.
- 藥物類別: Endocrine
- 用途: graves disease
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重點資訊
- 藥物類別
- Endocrine
- 已知交互作用
- 15 (嚴重: 4 · 中度: 8 · 輕微: 3)
用途
作用方式
Inhibits synthesis of thyroid hormone by blocking oxidation of iodine in thyroid gland; blocks synthesis of thyroxine (T4) and triiodothyronine (T3)
成人常用劑量（仿單摘要）
Hyperthyroidism: Mild: 15 mg/day PO divided q8hr initially, Moderate: 30-40 mg/day PO divided q8hr initially
懷孕與哺乳
- 懷孕
- Unsafe Crosses the placenta. 1st-trimester use is linked to rare birth defects (scalp skin defects, oesophageal or choanal atresia, abdominal wall defects). Propylthiouracil is usually preferred in the 1st trimester, then methimazole. Use the lowest dose; monitor maternal and fetal/newborn thyroid.
- 哺乳
- Safe Passes into milk, but a long-term study of 139 mothers found no infant toxicity, and doses up to 20 mg daily do not affect infant thyroid function. LactMed: some experts consider it the antithyroid drug of choice; take it right after a feed. US label: monitor thyroid function.
已通報的副作用
- Rash
- Hepatotoxicity
- Pruritus
- Alopecia
- Agranulocytosis
- Aplastic anemia
哪些人需要特別留意
- Antineutrophil cytoplasmic autoantibody (ANCA)-positive vasculitis reported; discontinue use in presence of vasculitis
- Concurrent administration of other agranulocytosis-causing drugs
- Significant bone marrow suppression may occur; use caution if administered with other agents known to cause myelosupression; discontinue if significan agranulocytosis
請告知藥師或醫師您是否懷孕或哺乳、是否患有腎臟或肝臟疾病、是否有過敏，以及您正在使用的所有其他藥物或保健品。
重要交互作用 (15)
- Carbamazepine + Methimazole Major
- Clozapine + Methimazole Major
- Methimazole + Propylthiouracil Major
- Methimazole + Sodium iodide i-131 Major
- Iodinated glycerol + Methimazole Moderate
- Iodine + Methimazole Moderate
- Lycopus + Methimazole Moderate
- Methimazole + Phenindione Moderate
- Methimazole + Potassium iodide Moderate
- Methimazole + Ropeginterferon alfa 2b Moderate
同類別的其他藥品
常見問題
What is Methimazole used for?
Methimazole is a medicine in the class endocrine. It is used for Graves disease, Hyperthyroidism, Melasma.
What side effects have been reported with Methimazole?
Rash, Hepatotoxicity, Pruritus, Alopecia, Agranulocytosis, Aplastic anemia.
Can Methimazole be taken in pregnancy or while breastfeeding?
Pregnancy: Unsafe. Crosses the placenta. 1st-trimester use is linked to rare birth defects (scalp skin defects, oesophageal or choanal atresia, abdominal wall defects). Propylthiouracil is usually preferred in the 1st trimester, then methimazole. Use the lowest dose; monitor maternal and fetal/newborn thyroid. Breastfeeding: Safe. Passes into milk, but a long-term study of 139 mothers found no infant toxicity, and doses up to 20 mg daily do not affect infant thyroid function. LactMed: some experts consider it the antithyroid drug of choice; take it right after a feed. US label: monitor thyroid function.
What does Methimazole interact with?
MediHelp lists 15 known interactions for Methimazole. Major: 4 · Moderate: 8 · Minor: 3. The most serious include Carbamazepine, Clozapine, Propylthiouracil.
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