Product description

Thyro-L is a levothyroxine sodium powder, USP for horses.

Active ingredients

Each Thyro-L pound (453.6 g) contains:

• Levothyroxine Sodium USP 0.22% (1,000 mg)
• Each level teaspoonful contains approximately 12 mg of T-4

Indications for use

Thyro-L is for use in horses for correction of conditions associated with low circulating thyroid hormone (hypothyroidism).

Administration and dosage

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

• Response to the administration of Thyro-L 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 (1/2 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.

Prescribing information