Health Canada’s only approved once-daily thyroid medication for dogs.

THYRO-TABS® CANINE is a prescription drug containing levothyroxine sodium, USP* as the active ingredient. Levothyroxine is a replacement for the hormone T4 in dogs, which is naturally produced in the body by the thyroid gland to regulate metabolism and energy.

The only scored tablet approved for once-daily dosing for correction of conditions associated with hypothyroidism in canines.

Lloyd Thyro tabs

Thyroid problems – when do they occur?

Hypothyroidism or low thyroid hormone is primarily due to failure of the thyroid gland. It usually occurs in middle aged, older dogs, and neutered animals. 


Breeds that are more prone to the disease include Golden Retrievers, Doberman Pinschers, Greyhounds, and Irish Setters.


Signs of hypothyroidism

When the metabolic rate slows down, virtually every organ in the body is affected. Most dogs with hypothyroidism have one or more of the following signs:

  • less energetic, lethargic, and uninterested in their favourite activities 
  • weight gain without an increase in appetite
  • get cold easily, prefer warm areas
  • dry, dull hair with excessive shedding
  • very thin to nearly bald hair coat, especially around the tail and under the abdomen 
  • increased dark pigmentation in the skin
  • increased susceptibility to skin and ear infections
  • failure to re-grow hair after clipping or shaving
  • high blood cholesterol
  • slow heart rate


The initial recommended daily dose and the usual maintenance dose is 0.1 mg per 4.5 kg body weight (0.022 mg/kg/day). A maximum of 0.8 to 1.0 mg total daily dose is sufficient in most dogs over 36 kg in body weight. The entire dose may be administered once per day or split in half and given twice per day.


THYRO-TABS® CANINE can be placed on the back of the tongue or in a medication-hiding treat (like Hide & Treat). Tablets can be given with or without food.
THYRO-TABS® CANINE is scored for precise dosing and color-coded in 8 concentrations from 0.1 mg to 0.8 mg in bottles of 120.

If your dog has been diagnosed with hypothyroidism, it means your pet is no longer able to produce enough thyroid hormone on their own.

The good news is that with proper treatment, your pet will be able to live a normal, healthy life.

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.