Health Canada’s only approved thyroid medication for dogs.

THYRO-TABS® is a prescription drug containing levothyroxine sodium as the active ingredient. Levothyroxine is a replacement for the hormone T-4, which is naturally produced in the body by the thyroid gland to regulate metabolism and energy.


THYRO-TABS® is the only veterinary brand to retain the USP* tablet designation and is guaranteed to minimum 95% dose potency for a full 24 months from the date of manufacture.

THYRO-TABS® is the sole hypothyroid medication for dogs that is manufactured under identical conditions and standards as THYRO-TABS® for humans.

Grey Wolf Animal Health is proud to be the Canadian distributor of Lloyd Inc.

*The United States Pharmacopeia (USP) : The USP is an independent, non-profit, scientific organization officially recognized by the Food and Drug Administration (FDA) as the accepted authority for defining pharmaceutical standards of purity, potency, and formulation characteristics.