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Methimazole Dosage

Medically reviewed by Drugs.com. Last updated on Aug 14, 2023.

Applies to the following strengths: 5 mg; 10 mg; 15 mg; 20 mg

Usual Adult Dose for:

Usual Pediatric Dose for:

Additional dosage information:

Usual Adult Dose for Hyperthyroidism

Initial dose:
Mild hyperthyroidism: 15 mg orally per day
Moderately severe hyperthyroidism: 30 to 40 mg orally per day
Severe hyperthyroidism: 60 mg orally per day

Maintenance dose:
5 to 15 mg orally per day

Comments: Daily doses are usually given in 3 divided doses at approximately 8 hour intervals

Uses:

Usual Pediatric Dose for Hyperthyroidism

Initial dose: 0.4 mg/kg orally per day

Maintenance dose: 0.2 mg/kg orally per day (approximately half the initial dose)

Comments: Daily doses are usually given in 3 divided doses at approximately 8 hour intervals

Renal Dose Adjustments

Data not available

Liver Dose Adjustments

Data not available

Dose Adjustments

An elevated TSH, during periodic monitoring of thyroid function, should lead to a decrease in the dosage of methimazole.

Precautions

CONTRAINDICATIONS:


Consult WARNINGS section for additional precautions.

Dialysis

Data not available

Other Comments

Administration advice:


General:

Monitoring:

Patient advice:

Frequently asked questions

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.