ERMEZA vs METHIMAZOLE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 20, 2026·How we rate

Possible drug interaction. ERMEZA and METHIMAZOLE are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	ERMEZA	METHIMAZOLE
Rating	66/100	New
Pharmacy pays	~$1.83 /30	~$2.28 /30
Type	RX	RX
Active ingredient	LEVOTHYROXINE SODIUM	METHIMAZOLE
Manufacturer	Mylan	Aiping Pharm Inc
Dosage forms	Solution	Tablet
Drug class	L-Thyroxine	Thyroid Hormone Synthesis Inhibitor
Boxed warning	None	None
Half-life	about 6 to 7 days in adults with normal thyroid function	—
Treats	Goiter, Myxedema, Thyroid Neoplasms	Goiter, Thyroid Crisis

ermeza methimazole

Rating

66/100

New

Pharmacy pays

~$1.83 /30

~$2.28 /30

Type

Active ingredient

LEVOTHYROXINE SODIUM

METHIMAZOLE

Manufacturer

Mylan

Aiping Pharm Inc

Dosage forms

Solution

Tablet

Drug class

L-Thyroxine

Thyroid Hormone Synthesis Inhibitor

Boxed warning

None

Half-life

about 6 to 7 days in adults with normal thyroid function

—

Treats

Goiter, Myxedema, Thyroid Neoplasms

Goiter, Thyroid Crisis

Frequently asked questions

Which is cheaper, Ermeza or Methimazole?

Ermeza costs pharmacies less to acquire — about $1.83 vs $2.28 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Ermeza and Methimazole?

Ermeza contains Levothyroxine Sodium, while Methimazole contains Methimazole — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.