Dosage: The suggested 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. 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. Administration: For oral dosing as directed by a veterinarian. Warning: Use with caution in 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. Caution: Federal law restricts this product to use by or on the order of a licensed veterinarian. Active Ingredient per pound 453.6 g: Levothyroxine Sodium 0.22% 1,000 mg One level teaspoonful contains approximately 12 mg of T-4. One level tablespoonful contains approximately 36 mg of T-4. Teaspoon measure included. IMPORTANT KEEP OUT OF REACH OF CHILDREN Store at room temperature and protect from light. Avoid excessive heat 104°F. Thyro L Powder Equine 10 lbs.. I do not receive this product or any others in exchange for this article, I do get a commission for readers clicking the buy now links which helps to differ the cost of hosting this blog and I sincerely hope this article site helps you with your search for Vet Approved Rx products.