The FDA has recalled certain levothyroxine tablets distributed by Major Pharmaceuticals and Cardinal Health. Learn which lots are affected, why they were recalled, symptoms to watch for, and what patients should do.
Millions of people rely on levothyroxine every day to manage hypothyroidism and other thyroid conditions. Now, one of the most widely used generic versions of the medication has become the focus of a nationwide recall in the United States after certain batches were found to contain less active ingredient than required.
The recall has raised concerns among patients, healthcare providers, and pharmacists because levothyroxine is considered a narrow therapeutic index (NTI) medication. Even small changes in the amount of active drug can significantly affect treatment outcomes.
This article explains what happened, why it matters, who is affected, and what patients should do.
What Happened?
Major Pharmaceuticals voluntarily recalled multiple lots of Levothyroxine Sodium Tablets after routine quality testing found that certain batches were subpotent, meaning they contained less levothyroxine than the labeled strength.
The recall began on July 13, 2026, and the U.S. Food and Drug Administration (FDA) later classified it as a Class II Recall. This classification means the affected products may cause temporary or medically reversible health problems, while the likelihood of permanent serious injury is considered low.
The recalled tablets were distributed nationwide under both the Major Pharmaceuticals and Cardinal Health labels.
Who Is Major Pharmaceuticals?
Major Pharmaceuticals is a U.S. distributor of generic prescription and over-the-counter medications. Rather than discovering new medicines, the company primarily markets FDA-approved generic drugs manufactured through partner facilities.
Its portfolio includes treatments for cardiovascular disease, diabetes, infections, pain management, thyroid disorders, and many other conditions.
The company has long supplied pharmacies, hospitals, and healthcare providers across the United States and has worked closely with Cardinal Health, one of the nation's largest pharmaceutical distributors.
Like many pharmaceutical distributors, Major Pharmaceuticals has participated in previous recalls involving products sold under its label when manufacturing or quality issues were identified.
What Does "Subpotent" Mean?
A medication is considered subpotent when it contains less active ingredient than stated on the label.
For example, a tablet labeled as 100 micrograms (mcg) may actually contain significantly less than 100 mcg.
Unlike many medications where small variations have little clinical impact, levothyroxine requires highly precise dosing. Receiving even a slightly lower dose over time can allow thyroid hormone levels to fall and symptoms of hypothyroidism to return.
Why Is Levothyroxine So Sensitive?
Levothyroxine is classified as a narrow therapeutic index drug.
This means:
Small differences in dose can change thyroid hormone levels.
Both underdosing and overdosing can lead to health problems.
Manufacturing quality and storage conditions are especially important.
The active ingredient is sensitive to:
Heat
Moisture
Light
Long-term storage conditions
Manufacturers therefore perform ongoing stability testing throughout a product's shelf life to ensure each batch remains within approved potency limits.
Which Products Were Recalled?
The recall affects selected lots only, not every levothyroxine product.
Affected strengths include:
25 mcg
50 mcg
75 mcg
88 mcg
112 mcg
125 mcg
150 mcg
The FDA advised patients to verify their lot numbers with their pharmacy because only specific production lots are included in the recall.
What Symptoms Could Occur?
If patients unknowingly receive a weaker dose over several weeks, thyroid hormone levels may gradually decrease.
Possible symptoms include:
Fatigue
Weight gain
Feeling unusually cold
Constipation
Dry skin
Hair thinning
Depression
Brain fog
Memory problems
Muscle weakness
Slow heart rate
These symptoms may develop gradually rather than suddenly, making them easy to mistake for aging, stress, or other health conditions.
What Should Patients Do?
Health experts emphasize not stopping levothyroxine abruptly without medical advice.
Patients should:
Check whether their medication's lot number matches the recalled batches.
Contact their pharmacist or healthcare provider if their medication is affected.
Obtain a replacement if necessary.
Continue treatment unless instructed otherwise by their healthcare provider.
Stopping thyroid hormone replacement suddenly may create greater health risks than temporarily taking a slightly under-potent tablet.
Are All Levothyroxine Products Unsafe?
No.
The recall applies only to specific production lots distributed under the Major Pharmaceuticals and Cardinal Health labels.
Brand-name products and generic versions from other manufacturers are not automatically affected unless they appear in separate FDA recall notices. Patients should avoid switching brands or adjusting doses without consulting their healthcare provider.
Official FDA Resources
For the most accurate and up-to-date information about this recall, visit the official U.S. Food and Drug Administration (FDA) pages below:
1. FDA Drug Recalls Database
This page contains all FDA drug recalls and allows you to search by company name or medication.
2. FDA Recalls, Market Withdrawals & Safety Alerts
This is the FDA's main recall portal for drugs, foods, medical devices, and other regulated products. Search for "Levothyroxine" or "Major Pharmaceuticals" to find the latest recall information.
🔗 FDA Recalls, Market Withdrawals & Safety Alerts
3. FDA Consumer Information
If you believe your medication may be affected, you can also contact the FDA or report adverse events through their official safety reporting system.
🔗 FDA Safety Information and Contact Resources
How to Check if Your Medication Is Recalled
Look at the prescription bottle or blister pack.
Find the manufacturer or distributor (such as Major Pharmaceuticals or Cardinal Health).
Locate the Lot Number and Expiration Date on the package.
Compare the information with the recalled lots listed on the FDA website.
If your medication matches a recalled lot, contact your pharmacist or healthcare provider for a replacement.
Important: This recall affects specific lots only. It does not mean that all levothyroxine products or all manufacturers are affected.
Levothyroxine USP, 25 mcg 100 Unit Doses Major® 0904-6949-61 N02212 07/2026 Levothyroxine USP, 50 mcg 100 Unit Doses Major® 0904-6950-61 N02200 10/2026 Levothyroxine USP, 75 mcg 100 Unit Doses Major® 0904-6951-61 N02172 07/2026 Levothyroxine USP, 75 mcg 100 Unit Doses Major® 0904-6951-61 N02296 12/2026 Levothyroxine USP, 75 mcg 100 Unit Doses Major® 0904-6951-61 N02288 12/2026 Levothyroxine USP, 88 mcg 100 Unit Doses Major® 0904-6952-61 N02310 01/2027 Levothyroxine USP, 112 mcg 100 Unit Doses Major® 0904-6954-61 N02203 09/2026 Levothyroxine USP, 125 mcg 100 Unit Doses Major® 0904-6955-61 N02266 11/2026 Levothyroxine USP, 150 mcg 100 Unit Doses Major® 0904-6956-61 N02167 07/2026 Levothyroxine USP, 25 mcg 10 Unit Doses Cardinal Bag: 55154-3558-0, Blister: 0904-6949-61 Bag: N02212A, Blister: N02212 07/2026 Levothyroxine USP, 25 mcg 10 Unit Doses Cardinal Bag: 55154-3558-0, Blister: 0904-6949-61 Bag: N02212B, Blister: N02212 07/2026 Levothyroxine USP, 50 mcg 10 Unit Doses Cardinal Bag: 55154-3559-0, Blister: 0904-6950-61 Bag: N02200A, Blister: N02200 10/2026 Levothyroxine USP, 50 mcg 10 Unit Doses Cardinal Bag: 55154-3559-0, Blister: 0904-6950-61 Bag: N02200B, Blister: N02200 10/2026 Levothyroxine USP, 75 mcg 10 Unit Doses Cardinal Bag: 55154-3560-0, Blister: 0904-6951-61 Bag: N02172A, Blister: N02172 07/2026 Levothyroxine USP, 75 mcg 10 Unit Doses Cardinal Bag: 55154-3560-0, Blister: 0904-6951-61 Bag: N02172B, Blister: N02172 07/2026 Levothyroxine USP, 75 mcg 10 Unit Doses Cardinal Bag: 55154-3560-0, Blister: 0904-6951-61 Bag: N02288A, Blister: N02288 12/2026 Levothyroxine USP, 75 mcg 10 Unit Doses Cardinal Bag: 55154-3560-0, Blister: 0904-6951-61 Bag: N02288B, Blister: N02288 12/2026 Levothyroxine USP, 125 mcg 10 Unit Doses Cardinal Bag: 55154-3562-0, Blister: 0904-6955-61 Bag: N02266A, Blister: N02266 11/2026 Levothyroxine USP, 125 mcg 10 Unit Doses Cardinal Bag: 55154-3562-0, Blister: 0904-6955-61 Bag: N02266B, Blister: N02266 11/2026 Levothyroxine USP, 150 mcg 10 Unit Doses Cardinal Bag: 55154-3563-0, Blister: 0904-6956-61 Bag: N02167A, Blister: N02167 07/2026
