Thyrosyn (Levothyroxine) is an oral thyroid hormone medication used in dogs and cats to treat hypothyroidism or other thyroid conditions due to low circulating thyroid hormone. It usually needs to be given for the life of the animal. It is given to treat conditions associated with low circulating thyroid hormone (hypothyroidism). This is a common disease of middle aged and older pets (where the animal's thyroid gland does not produce enough thyroid hormone) Cats don't often receive levothryoxine, but may be prescribed it for a short period to correct overtreatment of hyperthyroidism or if their thyroid gland was surgically removed.

Prescription Required


Levothyroxine Sodium