Drug reference
methimazole
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Drug class
Endocrine (Thyroid Drugs)
Mechanism of action
Inhibits synthesis of thyroid hormone by blocking oxidation of iodine in thyroid gland; blocks synthesis of thyroxine (T4) and triiodothyronine (T3)
Common side effects
- Hepatotoxicity
- Alopecia
- Pruritus
- Rash
- Agranulocytosis
- Aplastic anemia
- Neuritis
Related conditions
Frequently asked questions
What drug class is methimazole?
methimazole belongs to: Endocrine.
How does methimazole work?
Inhibits synthesis of thyroid hormone by blocking oxidation of iodine in thyroid gland; blocks synthesis of thyroxine (T4) and triiodothyronine (T3)
What are the common side effects of methimazole?
Hepatotoxicity, Alopecia, Pruritus, Rash, Agranulocytosis, Aplastic anemia, Neuritis
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