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Methimazole - Indications, Dosage, Side Effects and Precautions

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Information about Methimazole

Generic Name : Methimazole
Up-to-date prescription details regarding Methimazole are provided here.

Pronunciation : meth im' a zole

Learn the correct pronunciation of the Methimazole, understand it's uses, recommended dosages, its indications, how to take, when to take, when not to take, side effects, special precautions, warnings and its and its storage instructions.
You will also find a list of the medication's International and Indian brand or trade names, as well as its pricing information. For verification of the information presented on this page or for additional clarifications, it's advisable to consult your doctor.


ICD Code : Y42.2 Therapeutic Classification : Thyroid and Antithyroid Agents

Trade Names/Brand Names of Methimazole

India :


Methimez .

International :


Mercazole, Thyrozole

Why is Methimazole Prescribed? (Indications)

This medication is an antithyroid agent, prescribed for hyperthyroidism. It works by inhibiting the production of thyroid hormone.

When should Methimazole not be taken? (Contraindications)

Hypersensitivity.

What is the dosage of Methimazole?

Adult: The initial daily dosage is 15 mg. It may be increased up to 60 mg, divided into 3 doses at 8-hour intervals. The maintenance dosage is 5 to 15 mg daily.
Pediatric: Initially, the daily dosage is 0.4 mg/kg, divided into 3 doses and given at 8-hour intervals.

How should Methimazole be taken?

It comes as a tablet to take by mouth, with or without food.

What are the warnings and precautions for Methimazole?

• Caution should be exercised in patients with history of decrease in blood cells, liver disease, any allergy, who are taking other medications, during pregnancy and breastfeeding.

• It may cause drowsiness, dizziness, or lightheadedness, do not drive a car or operate machinery while taking this medication.

What are the side effects of Methimazole?

Skin - Rash, hives, abnormal loss of hair, itching and skin pigmentation.
Gastrointestinal - Nausea, vomiting and stomach upset.
Musculoskeletal - Joint/muscle pain.
Central Nervous System - Tingling, headache, drowsiness, dizziness and fainting.
Miscellaneous - Loss of taste, swelling and jaundice.

What are the other precautions for Methimazole?

Avoid excess dosage.

What are the storage conditions for Methimazole?

Store it at controlled room temperature (15° to 30°C), and in an airtight container. Keep away from children.
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