Thyroid medication cost: how to pay less for levothyroxine

What you’re paying for

NIDDK says hypothyroidism is treated by replacing the hormone your thyroid can no longer make, with levothyroxine, a thyroid hormone medicine identical to the one a healthy thyroid makes. It’s usually a pill, and it also comes as a liquid and a soft gel capsule. NIDDK says these newer forms may help people with digestive problems absorb the hormone (NIDDK).

Shop around, but watch the manufacturer

Price checking is smart, but with thyroid medicine there’s a catch. The American Thyroid Association says the brands contain the same levothyroxine with different inactive ingredients, so it’s generally best to stay on the same brand, or the same manufacturer of a generic, for consistency. If a change is unavoidable, let your doctor know so your levels can be rechecked (ATA).

• When you compare pharmacies, ask which manufacturer’s levothyroxine each one stocks.
• Check the label each time you refill. If the manufacturer changes, call your doctor.
• Ask your pharmacist whether a 90-day fill costs less than three 30-day fills on your plan or with a discount card.

Save on the blood tests too

NIDDK says your doctor will check your blood about 6 to 8 weeks after you start, retest each time your dose changes, then usually repeat the test in 6 months and once a year (NIDDK). A few habits can help you avoid confusing results and extra tests:

• Take it the same way every day. ATA says the best time is usually first thing in the morning on an empty stomach, and that consistency matters most (ATA).
• Space out supplements. Iron, calcium, soy, some antacids and some cholesterol-lowering medicines can keep you from absorbing the full dose (ATA). Ask your doctor or pharmacist how to time them.
• Pause biotin before a test. ATA says biotin supplements can interfere with thyroid blood tests and recommends stopping them 2 to 3 days before (ATA).
• Tell your doctor about other medicines. Birth control pills, estrogen, testosterone and some seizure and heart medicines can change the dose you need (ATA).
• Pregnant? NIDDK says many women need a higher dose during pregnancy, so contact your doctor right away (NIDDK).

Uninsured? HRSA-funded health centers offer care on a sliding fee based on income. Find one near you.

If you have Medicare

• Out-of-pocket costs for covered Part D drugs are capped at $2,100 in 2026 and $2,400 in 2027 (Medicare.gov).
• If you have limited income, ask about Extra Help with drug costs (Medicare.gov).
• If you buy a drug with a discount card instead of your plan, it doesn’t count toward your out-of-pocket limit (Medicare.gov). During open enrollment, check that your plan covers your thyroid medicine. See our Medicare open enrollment guide.

If you’re uninsured or underinsured

• Compare a discount card price for your generic with what you’d pay elsewhere. See how discount cards work.
• Illinois open enrollment for 2027 plans runs November 1, 2026 to January 15, 2027 at Get Covered Illinois.

On other daily medicines too? See our generic blood pressure and cholesterol guide and our diabetes medication cost guide.