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Prescription medicine · generic available

Methimazole

Drug class: Thyroid Hormone Synthesis Inhibitor

The FDA’s “Established Pharmacologic Class”: the group of medicines that work in a similar way.

Full FDA label All drugs

Official FDA data, not advice

Everything here comes from the U.S. Food and Drug Administration (FDA): the drug label, the NDC Directory, Drugs@FDA, recall reports and the drug shortage list. Each fact shows its source and date.

This page is not medical advice. Talk to your doctor or pharmacist before you start, stop or change any medicine.

In an emergency, call 911. If someone may have taken too much of a medicine, call Poison Help: 1‑800‑222‑1222.

At a glance

NoBoxed warning
None listedFDA shortage list
0Recalls (FDA reports)
21Companies
2000First FDA approval on file

Quick answers

What is Methimazole used for?
The FDA-approved label (Methimazole, Remedyrepack Inc., September 9, 2026) says: “Methimazole tablets are indicated: In patients with Graves' disease with hyperthyroidism or toxic multinodular goiter for whom surgery or radioactive iodine therapy is not an appropriate treatment option. To ameliorate symptoms of hyperthyroidism in preparation for thyroidectomy or radioactive iodine therapy.” This page is not medical advice. Talk to your doctor or pharmacist before you start, stop or change any medicine.
Does Methimazole have a boxed warning?
No. None of the 39 FDA labels we found for this medicine has a boxed warning.
Is there a shortage of Methimazole?
No current shortage is listed by the FDA for the products of this medicine (FDA data from October 30, 2026).
Has Methimazole been recalled?
No recall linked to the products of this medicine appears in the FDA enforcement reports we use.
Who makes Methimazole?
21 companies list prescription products of Methimazole in the FDA NDC Directory, including Bryant Ranch Prepack, Preferred Pharmaceuticals Inc. and Remedyrepack Inc..

What Methimazole is used for

Quoted from the “Indications and Usage” section of the FDA-approved label.

Methimazole tablets are indicated: In patients with Graves' disease with hyperthyroidism or toxic multinodular goiter for whom surgery or radioactive iodine therapy is not an appropriate treatment option. To ameliorate symptoms of hyperthyroidism in preparation for thyroidectomy or radioactive iodine therapy.

— FDA label: Methimazole, Remedyrepack Inc., effective September 9, 2026. Read the full label on DailyMed →

The FDA has 39 labels for products of this medicine (different makers and forms); uses can differ between them. Check the label that comes with your own medicine.

This page is not medical advice. Talk to your doctor or pharmacist before you start, stop or change any medicine.

Boxed warning

A boxed warning (“black box”) is the FDA’s strongest warning on a drug label, for serious or life-threatening risks.

The label quoted above has no boxed warning.

0 of 39 FDA labels for this medicine have a boxed warning.

Forms and how it is given

Dosage formsTablet
RouteOral
Prescription products54 in the FDA NDC Directory

What pharmacies pay (NADAC)

The National Average Drug Acquisition Cost (NADAC) is the average price U.S. retail pharmacies paid to buy one unit of a medicine (one tablet, one mL or one gram), from a monthly survey of pharmacy invoices by the Centers for Medicare & Medicaid Services (CMS). State Medicaid programs use it to pay pharmacies.

This is not the price you pay. What you pay depends on your insurance (copay or coinsurance), your pharmacy and any discounts, and pharmacies also charge for filling a prescription. Ask your pharmacist or your health plan what your price will be.

NADAC per unit for Methimazole, by strength and form
Strength and formGeneric or brandPharmacies pay
methimazole 10 mg
tablet		 Generic $0.1187 per tablet
methimazole 5 mg
tablet		 Generic $0.0694 per tablet

NADAC list of November 4, 2026; these prices took effect on October 21, 2026. Shown only where a package’s NDC code matches the NADAC list exactly, and only for that exact strength and form: nothing is averaged across strengths. Strengths and forms not listed here have no NADAC price.

Source: NADAC (National Average Drug Acquisition Cost) 2026, data.medicaid.gov (CMS) →

Companies that list this medicine

Labelers in the FDA NDC Directory: the company named on the package (maker or distributor), with the number of prescription products.

FDA approval history

  • ANDA: Abbreviated New Drug Application: how a generic version is approved.

Generic approvals (8)

Shortage status

The FDA drug shortage list does not show these products.

FDA Drug Shortages database →

Recalls

No recall linked to these products (by their NDC code) appears in the FDA enforcement reports.

Official identifiers

RxCUI (RxNorm)197941, 197942
SPL set ID of the quoted labelf69edfa9-0efb-4fe8-aeab-50f7baeebb6a
FDA labels (SPL)39
FDA applications8 ANDA
Active ingredients (FDA)METHIMAZOLE

Sources

  1. FDA-approved label on DailyMed (National Library of Medicine) — Methimazole, Remedyrepack Inc., effective September 9, 2026; via openFDA, FDA data exported October 30, 2026, retrieved October 31, 2026
  2. NDC Directory (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
  3. Drugs@FDA (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
  4. Drug recall enforcement reports (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 27, 2026, retrieved October 31, 2026
  5. Drug shortages (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026

openFDA data is provided by the FDA as is; it may be incomplete. Always rely on the label that comes with your medicine. FDA Enforcement Report search →

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