Hello, Thanks for posting in HCM. Dosage decreasing is required as your tsh values have gone below normal which means you are heading towards hyperthyroidism from the previous state of hypothyroidism. Also your t3 and t4 and well in range on higher side. So at this point to avoid you going in hyperthyroidism state and maintain your thyroid profile in normal range, dosage reduction is necessary. So kindly consult your doctor and follow the advice given for reduction in dose. Hope this answers your query. Thank you