THYROTROPIN ALFA IS A RECOMBINANT FORM OF THYROTROPHIN USED IN THE FOLLOW-UP OF PATIENTS WITH THYROID CANCER. THE USUAL DOSE IS 900 MICROGRAMS INTRAMUSCULARLY, EVERY 24 HOURS FOR TWO DOSES, OR EVERY 72 HOURS FOR THREE DOSES, GIVEN BEFORE SERUM-THYROGLOBULIN TESTING WITH OR WITHOUT RADIO-IODINE IMAGING.
WHEN THYROTROPIN ALFA IS USED TO INCREASE RADIO-IODINE UPTAKE FOR ABLATION OF THYROID REMNANT TISSUE AFTER THYROIDECTOMY, A DOSE OF 900 MICROGRAMS INTRAMUSCULARLY, EVERY 24 HOURS FOR 2 DOSES MAY BE USED; RADIO-IODINE IS GIVEN 24 HOURS AFTER THE SECOND DOSE OF THYROTROPIN ALFA.