**RX** Federal law restricts this drug to use by or on the order of a licensed veterinarian.
Available in 1 and 10 lb.
Levothyroxine sodium powder supplement for use in horses for correction of conditions associated with low circulating thyroid hormone (hypothyroidism).
Dosage: 0.5 to 3.0 mg levothyroxine sodium (T-4) per 100 pounds body weight once per day or in divided doses.
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