Armour Thyroid Tablet
Armour Thyroid is an FDA-approved commercial tablet containing desiccated thyroid, dispensed by Mixlab for veterinary use in dogs. Available by prescription.
"The uses and pharmacology described below reflect the FDA-approved labeling for this active ingredient; your veterinarian determines whether and how they apply to your animal's treatment plan.
Armour Thyroid is desiccated thyroid extract containing both T4 and T3 thyroid hormones. On the FDA-approved human label, it is indicated as replacement therapy for hypothyroidism.
In veterinary medicine, desiccated thyroid is used off-label in dogs with hypothyroidism, though synthetic levothyroxine is the more commonly prescribed standard replacement therapy. Your veterinarian determines which form is appropriate and monitors thyroid hormone levels during treatment. This information is not a substitute for veterinary diagnosis, prescribing, or monitoring."
Dosing is individualized based on periodic thyroid hormone bloodwork, not given by a fixed schedule. Signs of over-replacement include restlessness, panting, weight loss, and a rapid heart rate; signs of under-replacement include lethargy, weight gain, and hair coat changes. Give consistently relative to feeding, since food can affect absorption. Do not switch between thyroid products without your veterinarian's guidance, since bioequivalence can vary between formulations.
Yes. Armour Thyroid is available only by prescription from a licensed veterinarian.
The active ingredient has an FDA-approved human label. Mixlab dispenses the commercial tablet under a licensed veterinarian's prescription for use in your dog.
Armour Thyroid is used as a thyroid hormone replacement for dogs with hypothyroidism. Your veterinarian determines whether this or another thyroid product is the right fit based on your dog's bloodwork.
Contact Mixlab to discuss your patient's specific needs — compounding options are evaluated case by case.
