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Levoxine Powder

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

Levoxine Powder

This treatment applies to the following species:
Company: First Priority

Priority Care® 1

A Palatable Supplement for the Correction of Conditions Associated with Hypothyroidism in Horses and Ponies


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

For Animal Use Only • Keep Out of Reach of Children

INGREDIENTS: Each pound (453.6 g) contains:

Levothyroxine Sodium USP

0.22% (1.0 g)

One level teaspoonful contains 12 mg of T4; one level tablespoonful contains 36 mg of T4.


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.


Store at controlled room temperature between 15°-30°C (59°-86°F). Keep container tightly closed when not in use.


Levoxine Powder Indications

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

DOSAGE: Doses should be individualized and animals should be monitored daily for clinical signs of hyperthyroidism or hypersensitivity. Suggested initial doses are 1-10 mg levothyroxine sodium (T4)/100 lb. body weight (2-20 mg/100 kg) once per day or in divided doses. Response to the administration of Levoxine™ Powder should be evaluated clinically every week until an adequate maintenance dose is established. In most horses, this is usually in the range of 35 to 100 mg total daily dose of T4 (1-3 level tablespoonfuls Levoxine™ Powder).

Priority Care is a registered trademark of First Priority, Inc.

Made in U.S.A.

Manufactured By: FIRST PRIORITY, INC., Elgin, IL U.S.A.

Net Contents:


Reorder No.


1 lb (453.6 g)



Rev. 02-14

10 lb (4.5 kg)



Rev. 08-08

CPN: 1139045.9

1590 TODD FARM DRIVE, ELGIN, IL, 60123-1146
Telephone:   847-289-1600
Order Desk:   800-650-4899
Fax:   847-289-1223
Every effort has been made to ensure the accuracy of the Levoxine 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