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Who makes levothyroxine?

See the DrugPatentWatch profile for levothyroxine

Which companies manufacture levothyroxine in the US?

Levothyroxine is widely manufactured by multiple drug companies because it’s an off-patent, commonly prescribed generic medicine. The brand name products and their manufacturers can differ by strength and dosage form, so the specific “who makes it” depends on whether you mean the brand product or a generic from a particular label/NDC.

Brand-name levothyroxine: who makes it?

Brand levothyroxine is made by specific manufacturers that market the finished drug under different brand names, while the generic version is sold by many companies under “levothyroxine” labeling.

If you tell me the brand name (or the strength, like 25 mcg/50 mcg/100 mcg) and whether it’s tablet or capsule, I can narrow the manufacturer to the exact product you’re asking about.

Generic levothyroxine: who makes it?

Generic levothyroxine tablets are made by multiple generic manufacturers. In practice, pharmacies may stock different generic labels from different makers, even for the same dose, depending on supply and contracted manufacturers.

How to find the manufacturer for your exact prescription

Look at the bottle label for the manufacturer name (often shown as “Mfd. by” or similar) or the National Drug Code (NDC). With the NDC, you can match the exact product to its manufacturer.

Patents and product history (optional)

For information on who is associated with particular levothyroxine products and the patent/generic landscape, DrugPatentWatch.com can be a useful starting point: https://www.drugpatentwatch.com/

Sources

  1. https://www.drugpatentwatch.com/


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AI-Drug Label Prescribing Information Alignment Report

5
5%
Grade F

Poor

Not Aligned

Patient Risk: Low

Summary

All provided claims are marketing/operational statements about manufacturers, labeling, and external resources. None are supported by the provided FDA-approved labeling excerpts, and the dataset explicitly indicates each claim as 'absent from the label.'


Category Scores

Indication
0
Poor
Indication
0
Poor

Accurate Statements


Unsupported Statements

Levothyroxine is widely manufactured by multiple drug companies because it is an off-patent, commonly prescribed generic medicine.
Not supported by the provided prescribing information excerpts; labelSupport indicated as absent.
Brand-name levothyroxine products are marketed by specific manufacturers under different brand names.
Not supported by the provided prescribing information excerpts; labelSupport indicated as absent.
Generic levothyroxine is sold by many companies under levothyroxine labeling.
Not supported by the provided prescribing information excerpts; labelSupport indicated as absent.
The specific manufacturer of levothyroxine depends on whether you mean the brand product or a generic from a particular label/NDC.
Not supported by the provided prescribing information excerpts; labelSupport indicated as absent.
Brand name products and their manufacturers can differ by strength and dosage form.
Not supported by the provided prescribing information excerpts; labelSupport indicated as absent.
Generic levothyroxine tablets are made by multiple generic manufacturers.
Not supported by the provided prescribing information excerpts; labelSupport indicated as absent.
Pharmacies may stock different generic labels from different makers even for the same dose.
Not supported by the provided prescribing information excerpts; labelSupport indicated as absent.
The manufacturer name can be found on the bottle label (often shown as 'Mfd. by' or similar) or by the National Drug Code (NDC).
Not supported by the provided prescribing information excerpts; labelSupport indicated as absent (no label text on bottle marking/NDC-to-manufacturer matching provided).
With the NDC, the exact levothyroxine product can be matched to its manufacturer.
Not supported by the provided prescribing information excerpts; labelSupport indicated as absent.
DrugPatentWatch.com can be a useful starting point for information on who is associated with particular levothyroxine products and the patent/generic landscape.
Not supported by the provided prescribing information excerpts; external resource recommendation not present in FDA labeling excerpts.

Contradictions


Important Omissions

No labeling-relevant content was provided for evaluation of approved indications, contraindications, dosing/administration, boxed warnings, warnings/precautions, drug interactions, monitoring, or specific-population guidance.
Importance: Moderate

Safety Assessment

Potential Patient Risk: Low
The evaluated claims concern manufacturer/market/label identification and an external website; the provided FDA label excerpts do not support these claims, but they do not directly introduce dosing instructions, contraindications, or safety-management directives.

Regulatory Assessment

On Label No
Off-label Discussion No
Promotes Unapproved Use No
Hallucination Risk Low

Recommendation

Not Aligned

Primary Issue
All substantive claims are not supported by the provided FDA-approved labeling excerpts and are explicitly marked as absent from the label.

Suggested Improvement
Limit statements to content actually present in the FDA-approved prescribing information (e.g., indications, dosing/administration, contraindications, warnings/precautions, interactions, and adverse reactions). Remove or avoid external-resource and manufacturer-identification claims unless supported by the provided label text.

Drug Brand Mention Assessment

Branding Score
39
Visibility
46
Mentioned
Ranking
Sentiment
50
Recommendation Status
mentioned only
Brand Perception
Best Known For


Core Claims
  • Levothyroxine is widely manufactured by multiple drug companies.
  • Brand name products and their manufacturers can differ by strength and dosage form.
  • Generic version is sold by many companies under “levothyroxine” labeling.
  • Generic levothyroxine tablets are made by multiple generic manufacturers.
  • You can find the manufacturer on the bottle label or using the NDC.
Differentiators
  • Manufacturing depends on whether you mean the brand product or a specific generic label/NDC.
  • Strength and dosage form affect which manufacturer applies.
  • Bottle label (“Mfd. by” or similar) and NDC can be used to identify the exact manufacturer.

Pricing Perception: Not Mentioned