Top Picks: Leading Brands for Thyroid Medication

In managing thyroid health, selecting the right medication can make a significant difference in a patient's well-being. Numerous pharmaceutical companies offer thyroid medications, each with varying formulations, to cater to the diverse needs of individuals. Factors such as the type of thyroid disorder, patient preferences, and potential side effects often play a pivotal role in determining the most suitable brand. To help guide your choice, explore the list of leading brands for thyroid medication detailed below.

Illustration of thyroid medication

Best brands of thyroid medication in 2025

Synthroid

Synthroid, a brand name for levothyroxine, is one of the leading producers of thyroid medication, widely prescribed for treating hypothyroidism. It was the second most prescribed drug in the United States as of 2014, highlighting its widespread use and trust among healthcare providers. Synthroid is part of the oral levothyroxine market, which accounts for the largest market revenue share due to its high bioavailability, ease of administration, and efficacy. The global levothyroxine market, including Synthroid, is projected to grow at a CAGR of 3.3% to 3.5% from 2024 to 2031, driven by the rising incidence of thyroid disorders. Synthroid is available in various regions, including the U.S., Canada, and the EU, under different brand names such as Eltroxin and Euthyrox.

Euthyrox

EUTHYROX is a leading brand in thyroid medication, renowned for its precise and protected potency, treating over 53 million patients annually worldwide. It is distinguished by its blister-packaged, dye-free, lactose-free, and gluten-free tablets, reducing potential adverse effects for patients with sensitivities. The brand also features Braille-imprinted packaging for visually impaired patients. As the world's most dispensed levothyroxine brand, EUTHYROX offers generic-priced medication with branded quality. Its widespread use underscores its reliability and effectiveness in managing hypothyroidism. For more information, visit their official website.

Levoxyl

Levoxyl, a brand of levothyroxine sodium, is a leading treatment for hypothyroidism, accounting for a significant share of the global levothyroxine market, which was valued at USD 3.8 billion in 2023 and is expected to grow at a CAGR of 3.3% from 2024 to 2034. Levoxyl is used to treat various forms of hypothyroidism, including primary, secondary, and tertiary hypothyroidism, and is also used to prevent goiter and treat thyroid cancer. The medication is widely prescribed due to its efficacy and the growing awareness of thyroid disorders, with around 200 million people worldwide suffering from some type of thyroid disease. Levothyroxine, including Levoxyl, held a 50.5% market revenue share in 2023, highlighting its dominance in the thyroid gland disorder treatment market. The oral form of Levoxyl is particularly popular due to its high bioavailability and ease of administration. For more detailed information, visit the Levoxyl drug information page.

Armour Thyroid

Armour Thyroid, produced by AbbVie, is a leading brand in thyroid medication, particularly for natural desiccated thyroid (NDT) treatments. It is indicated for replacement or supplemental therapy in patients with hypothyroidism of any etiology, excluding transient hypothyroidism during the recovery phase of subacute thyroiditis. The usual starting dose is 30 mg, with increments of 15 mg every 2 to 3 weeks, and most patients require 60 to 120 mg/day for effective treatment. Armour Thyroid dominates a significant portion of the thyroid gland disorder treatment market, which was valued at USD 2.22 billion in 2023 and is projected to grow at a CAGR of 3.6% from 2024 to 2030. The product is derived from porcine thyroid glands and provides a balanced mix of T3 and T4 hormones. For more in-depth information about Armour Thyroid, visit the link.

Nature-Throid

Nature-Throid, a brand of natural desiccated thyroid (NDT) medication, is highly regarded for its efficacy in treating hypothyroidism. Derived from porcine thyroid glands, Nature-Throid tablets contain a natural mixture of thyroid hormones, including T4 and T3, with each 65 mg (1 Grain) tablet providing 38 mcg of levothyroxine (T4) and 9 mcg of liothyronine (T3). This product has been a preferred choice due to its close mimicry of human thyroid hormones and long history of use. The NDT market, which includes Nature-Throid, is expected to grow significantly, with North America accounting for over 40% of the global market share in 2021. The market is projected to reach USD 1.8 billion by 2033, growing at a CAGR of 5.4% during the forecast period. For more information about Nature-Throid, visit their official drug page.

NP Thyroid

NP Thyroid, though not FDA-approved, is a brand-name prescription medication derived from pig thyroid glands, containing a mixture of T4 and T3 hormones. It is used to treat hypothyroidism, Hashimoto's disease, and other thyroid-related conditions. However, it has an average rating of 3.4 out of 10 from 245 ratings, with only 24% of reviewers reporting a positive effect. The medication is known for its inconsistent hormone levels between batches, which can lead to variable dosing and symptoms. Despite this, some patients prefer it over synthetic alternatives. For more detailed information on how it compares to similar medications, visit the NP Thyroid vs. Synthroid comparison.

Thyrolar

Thyrolar, a brand of liotrix tablets, is a highly regarded option for thyroid hormone replacement therapy, containing a combination of triiodothyronine (T3) and tetraiodothyronine (T4) in various potencies. It is indicated for treating hypothyroidism of any etiology, including cretinism, myxedema, and primary or secondary hypothyroidism. The typical maintenance dose ranges from 50 to 100 mcg T4 with 12.5 to 25 mcg T3 per day. Thyrolar tablets are available in five different strengths, ensuring flexible dosing options for patients. Despite levothyroxine being the preferred treatment, Thyrolar remains a significant choice due to its specific formulation and efficacy.

Tirosint

Tirosint, a brand from IBSA Pharma Inc., stands out as a leading producer of thyroid medication due to its unique formulation that avoids common excipients like wheat starch, lactose, sugars, dyes, and talc, making it ideal for patients with sensitivities. Approved by the FDA in 2006 for capsules and 2016 for the oral solution Tirosint-Sol, this medication offers consistent absorption even for those taking certain stomach medications like proton pump inhibitors. Tirosint-Sol is available in 15 different strengths and is designed for easy oral administration. Its formulation reduces the risk of cross-contamination and ensures better absorption, providing more consistent control of hypothyroid symptoms. This makes Tirosint a preferred choice for many patients.

Westhroid

Westhroid, a brand of thyroid medication, is highly regarded for its effectiveness in treating hypothyroidism, with each tablet containing 38 mcg of levothyroxine (T4) and 9 mcg of liothyronine (T3) per 65 mg. It is derived from porcine thyroid glands and is used as replacement or supplemental therapy for various forms of hypothyroidism. Westhroid has received positive reviews, with 80% of reviewers reporting a positive effect on Drugs.com. The medication is available in various strengths, including 16.25 mg, 32.5 mg, 48.75 mg, 65 mg, and 81.25 mg, catering to different patient needs. Its micro-coated tablets are designed to be easy to swallow and have a reduced odor. For detailed information about this medication, visit the Westhroid drug page.

Unithroid

Unithroid, a brand-name medication, is a leading producer of thyroid hormone replacement therapy, containing the active drug levothyroxine sodium, which is identical to the thyroxine (T4) produced by the human thyroid gland. It is FDA-approved to treat hypothyroidism in people of all ages and to suppress thyroid-stimulating hormone levels in those with certain types of thyroid cancer. The global levothyroxine market, which includes Unithroid, is projected to grow at a compound annual growth rate (CAGR) of 3.5% from 2024 to 2031, with the market size estimated at USD 3951.2 million in 2024. Unithroid is available in various strengths and can be prescribed at a starting dosage of 1.6 mcg per kilogram of body weight once per day. The medication is also available as a generic, which is considered just as safe and effective but tends to cost less. For more detailed information, visit Unithroid's drug information page.