#1 prescribed branded hypothyroidism treatment*
Millions of people have been prescribed Synthroid to help manage their hypothyroidism—more than any other brand.
*February 2019 through January 2025.
70 years of helping people manage their thyroid hormone levels
Doctors have turned to Synthroid for 70 years to help keep their patients’ thyroid hormone levels in balance.
Over 90% of doctors prefer Synthroid
HCPs trust Synthroid the most to provide a consistent formulation of levothyroxine sodium to treat hypothyroidism. †
† 92% in a survey of 136 participants.
Learn the basics of how Synthroid works to help restore your thyroid hormone levels to normal.
Take a closer look at how Synthroid works in the short video below.
PART 1: THE THYROID & HYPOTHYROIDISM
The thyroid is a small butterfly-shaped gland located at the base of the neck, just below the Adam’s apple. It’s responsible for controlling the body’s metabolism, or the rate at which the body converts food into energy, and for making sure the brain, heart, liver, kidneys, and other organs are working properly.
It does this by creating thyroid hormones that are then circulated through the bloodstream to different parts of the body.
When you have hypothyroidism, the thyroid doesn’t produce, or can’t produce enough thyroid hormones. When your thyroid hormone level decreases, it results in your body’s system slowing down, including your metabolism, which may lead to symptoms such as sensitivity to cold, weight gain, and fatigue.
These are not all the symptoms of hypothyroidism. Your doctor will use a TSH, or thyroid stimulating hormone, test to determine whether you have hypothyroidism.
PART 2: HOW SYNTHROID WORKS
Synthroid is a man-made hormone, identical to the hormone made by the thyroid gland and has the same effect on the body. It replaces the amount of hormone the thyroid is unable to or can no longer make, helping to restore your thyroid hormone levels to the range they need to be.
Because your body needs a precise number of thyroid hormone, it’s important to take Synthroid the right way every day, just as your doctor prescribes. This is because how you take Synthroid can affect how well it works.
Tablet shown is not actual size and may not represent exact color.
You can learn more about the right way to take Synthroid on this site.
Pay $25 a month ‡ with free delivery right to your door.
With a 90-day prescription. Other pricing available for 30 days ($29.50) and 60 days ($54). See full pricing information Terms, conditions, and eligibility restrictions apply.
SYNTHROID® (levothyroxine sodium) tablets, for oral use is a prescription, man-made thyroid hormone that is used to treat a condition called hypothyroidism in adults and children, including infants. It is meant to replace a hormone that is usually made by your thyroid gland. Generally, thyroid replacement treatment is to be taken for life. SYNTHROID should not be used to treat noncancerous growths or enlargement of the thyroid in patients with normal iodine levels, or in cases of temporary hypothyroidism caused by inflammation of the thyroid gland (thyroiditis).
This is the most important safety information you should know about SYNTHROID. For more information, talk with your doctor.
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088 .
If you are having difficulty paying for your medicine, AbbVie may be able to help. Visit AbbVie.com/myAbbVieAssist to learn more.
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Terms and Conditions apply. This benefit covers SYNTHROID ® (levothyroxine sodium). Eligibility: Available only to patients with commercial insurance coverage for SYNTHROID who meet eligibility criteria. The form of co-pay assistance, enrollment requirements, and processes may vary, please call 1-866-627-4980 for additional information. Co-pay assistance program is not available to patients receiving reimbursement under any federal, state, or government-funded insurance programs (for example, Medicare [including Part D], Medicare Advantage, Medigap, Medicaid, TRICARE, Department of Defense, or Veterans Affairs programs) or where prohibited by law or by the patient’s health insurance provider. If you live or receive treatment in certain states, you may not be eligible. If at any time a patient begins receiving drug coverage under any such federal, state, or government-funded healthcare program, patient will no longer be able to use the SYNTHROID Co-pay Savings Card and patient must call 1-866-627-4980 to stop participation. Co-pay assistance provided under this program is offered to and intended for the sole benefit of eligible patients and may not be transferred to or utilized for the benefit of third parties, including, without limitation, third-party insurance plans and/or pharmacy benefit managers and their agents. Patients may not seek reimbursement for value received from the SYNTHROID Co-pay Savings Program from any third-party payers, including insurance plans, flexible spending plans or health savings accounts. Co-pay support made available under this program may not be used with any other coupon, discount, prescription savings card, free trial, or other offer (including any program offered by a third-party insurance plan or pharmacy benefit manager, or an agent of either, that adjusts patient cost-sharing obligations). This is not health insurance. Offer subject to change or discontinuation without notice. Restrictions, including monthly maximums, may apply. Subject to all other terms and conditions, the maximum monthly benefit that may be available solely for the patient’s benefit under the co-pay assistance program is $15.00 per month during the calendar year for patients receiving SYNTHROID every month or $25.00 per month during the calendar year for patients receiving SYNTHROID every 3 months. Patients without health insurance may pay a fixed cash price of $39.95 for a 1-month prescription or $99.90 for a 3-month prescription. The actual application and use of the benefit available under the co-pay assistance program may vary on a monthly, quarterly, and/or annual basis, depending on each individual patient’s plan of insurance and other prescription drug costs. By utilizing this co-pay assistance program, you hereby accept and agree to abide by these terms and conditions. Any individual or entity who enrolls or assists in the enrollment of a patient in the co-pay assistance program represents that the patient meets the eligibility criteria and other requirements described herein. Further, you agree that you currently meet the eligibility criteria and other requirements described herein every time you use the co-pay assistance program. To learn about AbbVie’s privacy practices and your privacy choices, visit https://abbv.ie/corpprivacy .
You are leaving the AbbVie website and connecting to a site that is not under the control of AbbVie. AbbVie is not responsible for the content of any such site or any further links from such site. AbbVie is providing these links to you only as a convenience and the inclusion of any link does not imply the endorsement of the linked site by AbbVie. You should also be aware that the linked site may be governed by its own set of terms and conditions and privacy policy for which AbbVie has no responsibility.
Conversely, the presence of this link does not imply the linked site’s endorsement of AbbVie. Do you wish to leave this site?
SYNTHROID® (levothyroxine sodium) tablets, for oral use is a prescription, man-made thyroid hormone that is used to treat a condition called hypothyroidism in adults and children, including infants. It is meant to
Thyroid hormones, including SYNTHROID, should not be used either alone or in combination with other drugs for the treatment of obesity or weight loss. In patients with normal thyroid levels, doses of SYNTHROID used daily for hormone replacement are not helpful for