I collected thyroid results today. I had a full thyroidectomy in 1985. Thyroid Register doesn't exist any more but when it did I was on 150mcg Thyroxine. It has now been dropped to 75mcg! Serum Free T4 level is 20 pmol/L, Serum TSH level is 2.19 mU/L. There's other readings but highlighted are Serum inorganic phosphate is 1.55 mmol/L, Serum sodium is 128mmol/L, Serum chloride is 93 mmol/L. Hope someone can help! New TFT requested to include T3 next Monday.