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ThyroVet Powder

This page contains information on ThyroVet Powder for veterinary use.
The information provided typically includes the following:
  • ThyroVet Powder Indications
  • Warnings and cautions for ThyroVet Powder
  • Direction and dosage information for ThyroVet Powder

ThyroVet Powder

This treatment applies to the following species:
Company: VetOne

(Levothyroxine Sodium USP 0.22%)

For animal use only.

Keep out of the reach of children.

ThyroVet Powder Caution

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

ThyroVet Powder Indications

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

DOSAGE: 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. Response to the administration of ThyroVet™ Powder should be evaluated clinically until an adequate maintenance dose is established. In most horses, the total daily dose of T-4 is in the range of 6 to 36 mg. 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: ThyroVet™ Powder can be administered by mixing the daily dose in the concentrate or by top dressing on the grain, preferably rolled or ground. To facilitate the proper adhesion of ThyroVet™ Powder to the ration, slightly moisten the grain with water or a liquid supplement.

Active Ingredients

Each pound (453.6 g) contains:

Levothyroxine Sodium USP

0.22% (1.0 g)

One teaspoon contains:

12 mg of T-4

One tablespoon contains:

36 mg of T-4


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


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.

Manufactured by: Neogen Corporation, Lexington, KY 40511

Distributed by: MWI, Boise, ID 83705

(888) 694-8381


Net Contents:




1 lb (453.6 g)


V1 510017

Rev. 02/13

10 lb (4.536 kg)


V1 510018

Rev. 02/13

CPN: 13151780

Distributed by MWI Animal Health

3041 W. PASADENA DR., BOISE, ID, 83705
Customer Service:   888-694-8381
Toll-Free:   800-824-3703
Every effort has been made to ensure the accuracy of the ThyroVet Powder information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the US product label or package insert.

Copyright © 2020 Animalytix LLC. Updated: 2020-10-21