FDA.reportPublic FDA data

Thyrosyn

Manufacturer
Vedco, Inc | Neogen Corporation-Mercer
Effective date
2014-11-07
Label type
PRESCRIPTION ANIMAL DRUG LABEL
Version
2
Source
legacy-cache
Hydrated at
2026-08-02 01:34:37

Label at a glance#

ProductThyrosyn
Active ingredientLEVOTHYROXINE SODIUM
Label structure9 sections

Label contents#

Full prescribing information#

DESCRIPTION SECTION

EQUI-PHAR

THYROSYN

POWDER

FOR ANIMAL USE ONLY

KEEP OUT OF REACH OF CHILDREN

CAUTION: Federal law restricts this drug to use by or on the order of a licensed veterinarian.

WARNINGS SECTION

​FOR ANIMAL USE ONLY

INDICATIONS:​

INDICATIONS & USAGE SECTION

For use in horses for correction of conditions associated with low circulating thyroid hormone (hypothyroidism).

​DOSAGE:

DOSAGE & ADMINISTRATION SECTION

The suggested initial dose is 0.5 to 3.0 mg levothyroxine sodium (T-4) per 100 lbs of body weight (1 to 6 mg per 100 kg) once per day or in divided doses. The recommended daily dose is ½ to 2 ½ level teaspoons for a 500 kg (1100 lb) horse.

Response to the administration of Thyrosyn Powder should be evaluated clinically until an adequate maintenance dose is established. In most horses, this is usually in the range of 6 to 36 mg (½ to 3 level teaspoons) total daily dose of T-4. Serum T-3 and T-4 values can vary greatly among individual horses on thyroid supplementation. Dosages should be individualized and animals should be monitored daily for clinical signs of hyperthyroidism or hypersensitivity.

​ADMINISTRATION:

Thyrosyn Powder can be administered by mixing the daily dose in the concentrate or by top dressing on grain, preferably rolled or ground. To facilitate proper adhesion of Thyrosyn Powder to the ration, slightly moisten the grain with water or liquid supplement.

SPL UNCLASSIFIED SECTION

Manufactured by

Neogen Corporation

Lexington, KY 40511

Distributed By

​Vedco, INC.

​St. Joseph, MO 64507

​ACTIVE INGREDIENTS

DESCRIPTION SECTION

Each pound (453.6 g) contains:

Levothyroxine Sodium USP:..........................0.22% (1.0 g)

One level teaspoon contains: ...................... 12 mg of T-4

One level tablespoon contains: .................... 36 mg of T-4

​PRECAUTIONS:

WARNINGS AND PRECAUTIONS SECTION

Store at 20°-25°C (68°-77°F) with excursions between 15°-30°C (59°-86°F) and protect from light.

​WARNING: Administer with caution to animals with clinically significant heart disease, hypertension, or other complications for which a sharply increased metabolic rate might prove hazardous. Use in pregnant mares has not been evaluated. ​

SPL UNCLASSIFIED SECTION

Made in USA

L821-11309

Lot No.

Exp. Date

PRINCIPAL DISPLAY PANEL - 1 Pound Bottle

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL

NDC 50989-172-26

EQUI-PHAR

THYROSYN

POWDER

NET CONTENTS: 1 LB. (453.6 g)

VEDCO

FOR ANIMAL USE ONLY

KEEP OUT OF REACH OF CHILDREN

CAUTION: Federal law restricts this drug to use by or on the order of a licensed veterinarian.

1 Pound Bottle Label1 Pound Bottle Label

DailyMed Socrata Ingredients#

Ingredient, Type, UNII table
IngredientTypeUNIISPL versionUploaded
LEVOTHYROXINE SODIUMACTIVE INGREDIENT9J765S329G2
LEVOTHYROXINEACTIVE MOIETYQ51BO43MG42

Products#

Every source-derived product name is available through these pages.

DailyMed product names page 1 of 1 · 4 matching rows.

NDC Codes#

Product NDC, Package NDC table
Product NDCPackage NDC
50989-17250989-172-26

Ingredients#

Every source-derived ingredient row is available through these pages.

DailyMed ingredient rows page 1 of 1 · 1 matching rows.

Name, UNII, Kind table
NameUNIIKind
LEVOTHYROXINE SODIUM9J765S329GACTIR

Source Document#

Source XML

openFDA label cross-check#

OpenFDA label data provides additional search and identifier links. DailyMed’s Structured Product Label is the canonical label on FDA.report. Matching records are deduplicated before they are shown below.

Matched openFDA labels page 1 of 14 · 272 matching rows.

Brand, Generic, Manufacturer table
BrandGenericManufacturerSPL set IDEffective dateAvailable safety fieldsJoin
Levothyroxine sodiumLEVOTHYROXINE SODIUMREMEDYREPACK INC.bc9385d0-5c67-4bde-94da-e621347e2cba2026-09-10Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine sodiumLEVOTHYROXINE SODIUMREMEDYREPACK INC.4c903249-69e9-4168-a9d1-22e6c2c1eb222026-09-10Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine sodiumLEVOTHYROXINE SODIUMREMEDYREPACK INC.6f25cbb3-0358-4778-b8f0-f76479a2dcc52026-09-10Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine sodiumLEVOTHYROXINE SODIUMREMEDYREPACK INC.7fd988be-ab3d-406d-a55d-1e5a8a2101cc2026-09-10Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine sodiumLEVOTHYROXINE SODIUMREMEDYREPACK INC.6108759a-783e-42ca-b078-6a3cd84ce9012026-09-10Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMREMEDYREPACK INC.13e03769-9a4f-497f-9afa-95bf525090b32026-09-09Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
LEVOTHYROXINE SODIUMLEVOTHYROXINE SODIUMNorthStar RxLLC58f4dc90-3648-49dc-a7e1-baf918a773b52026-08-20Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMNuCare Pharmaceuticals, Inc.597ea445-d926-adc6-e063-6394a90a64462026-08-20Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMCoupler LLC55f4c679-86cb-b97f-e063-6294a90ad5ef2026-07-06Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMCoupler LLC55f67831-4680-edbf-e063-6294a90a1d362026-07-06Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMBryant Ranch Prepack489ffba8-983e-478f-8f62-fe08bf3d0e0b2026-06-23Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMCoupler LLC544d67eb-8487-cb5d-e063-6394a90a31102026-06-15Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
levothyroxine sodiumLEVOTHYROXINE SODIUMBryant Ranch Prepack3b282e57-1009-4d2c-8ca2-9cca9f7919372026-06-12Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMCoupler LLC53e84179-fe2a-5696-e063-6394a90a85662026-06-10Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
LEVOTHYROXINE SODIUMLEVOTHYROXINE SODIUMCoupler LLC5383a4d8-319a-5bf6-e063-6294a90a54972026-06-05Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMNCS HealthCare of KY, LLC dba Vangard Labsabe173cc-1579-43a5-b12d-a31958d0a5392026-06-04Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMCardinal Health 107, LLC66a3bd4a-770b-4f67-bfa7-6d5e23f2ecbf2026-06-04Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMCoupler LLC53316e75-9897-4935-e063-6294a90a94cf2026-06-01Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMBryant Ranch Prepack5852d874-1ebc-49ff-b6c2-1dd513fca7842026-05-27Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM
Levothyroxine SodiumLEVOTHYROXINE SODIUMA-S Medication Solutionsc8ae9dc4-836f-4912-80d7-684fd374f40a2026-05-27Boxed warning, Warnings, Adverse reactionsName fallback
generic name: LEVOTHYROXINE SODIUM

Reported adverse events (FAERS/openFDA)#

Adverse event summaries are temporarily unavailable. Other product information remains available.