Latest TSh result.

[Teddy-Twoshoes]

Hi, I had some tests done in July, and they were as follows, Serum free T3 4.6 pmol/L ref 3.5- 6.50 pmol/L Serum free T4 13.1pmol/L ref 11.00- 23.00 pmol/L Serum 0.90mu/L ref 0.35- 5.50mu/L , some advice from Clutter on this forum suggested that my tsh was low- normal, but my Ft4 was low in range, and maybe I had secondary hypothyroidism, I went back to my GP and he gave me a 3 month trial of Levothyroxine, I have been on them nearly 3 months now, firstly 25mcg, and the last month have upped them to 50 mcg, i do seem to have more energy, and less brain fog, but have noticed my pulse racing at times. Anyway had TSH level checked last week have just picked up results, and my TSH is 0.37 mu/L range is 0.35 - 5.50, is my recent level ok, it seems to have jumped quite a bit,if I stay on the levothyroxine will it continue to rise, I dont want to become overcative, they didnt check my Ft3, and Ft4 even though the nurse requested it, I will be seeing a GP next week, any avice would be appreciated. Thanks.

[Clutter]

Teddytwoshoes, If, as it appears he may, your GP suspects secondary hypothyroidism (pituitary dysfunction) is a possibility, TSH measurement is valueless and he must insist the lab tests FT4 and FT3. Stating secondary or central hypothyroidism on the blood order should ensure the lab test FT4 and FT3. NICE recommend suspected secondary hypothyroidism is managed in endocrinology as pituitary dysfunction may cause other hormone deficiencies.

cks.nice.org.uk/hypothyroid...

TSH has dropped to 0.37 from 0.90 because your FT4 and FT3 have risen thanks to 50mcg Levothyroxine. It's a modest drop and still within range which suggests FT4 and FT3 haven't risen much. FT4 would have to be >23 and FT3 >6.5 before you could be considered overmedicated. If you stop Levothyroxine FT4 and FT3 will drop and TSH wll rise, but as previously, not enough to stimulate sufficient T4.

Pulse may be a little faster at times due to metabolic changes as your system adapts to replacement thyroid hormone. If it is intermittent it is likely to settle down in time. If it is constant you may be a little overmedicated and might try 25/50mcg alternate days.

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I am not a medical professional and this information is not intended to be a substitute for medical guidance from your own doctor. Please check with your personal physician before applying any of these suggestions.

[Teddy-Twoshoes in reply to Clutter]

Thankyou Cluttter, have an appointment next week to see him, and will ask him to make a request for the Lab to do, FT4, and FT3, I think I will try 25mcg, on intermittent days, I do seem to have more energy, and less foggy brained since I have been on the medication, will keep you informed of what the GP says!