Thyroxine (T4)

The measurement of thyroxine (T4) at a single point in time. It is important to know that a dog receiving Thyforon® therapy is absorbing the medication appropriately. Insufficient absorption or insufficient dose will lead to treatment failure and over-dose can lead to clinical signs of hyperthyroidism. When a T4 measurement is made, it is important to record the hours post-pill at which the sample was taken to be able to appropriately interpret the results.