We need the reference ranges for your results please to be able to interpret them. Ranges vary from lab to lab so we need the ranges from the lab which did your tests.
For a treated hypo patient your TSH is too high. The aim of a treated hypo patient generally is for TSH to be 1 or below or wherever it needs to be for FT4 and FT3 to be in the upper part of their respective reference ranges when on Levo if that is where you feel well. So that already tells us that you are probably undermedicated which is why you don't feel well.
As far as T3 goes, it's far too early to know if you need it. You need your TSH down to 1 or lower, then FT4 and FT3 tested at the same time as the TSH. That then tells us whether you convert T4 to T3 well enough. If your conversion is poor then T3 may help. It's usually the lab that makes the decision to test FT3 even when a GP requests it, and it's not normally done unless TSH is below range. This is why your FT3 hasn't been tested.
But for any thyroid hormone to work properly, optimal nutrient levels are necessary:
Vit D
B12
Folate
Ferritin
So I would ask for those to be tested, then post results/ranges on here for comment.
Are you taking your Levo correctly? On an empty stomach, one hour before food or two hours after, at least 2 hours away from other medication and any supplements (some need at least 4 hours).
Always advised here, when booking thyroid tests, always book the very first appointment of the morning and fast overnight (water allowed) . This gives the highest possible TSH which is needed when looking for a diagnosis, an increase in dose or to avoid a reduction. TSH is highest early morning and lowers throughout the day. It can also lower after eating and coffee also affects TSH. Also, take your Levo after the blood draw because if you take it before then your FT4 will reflect this and show higher than what is normally circulating. We usually advise 24 hours between last dose of Levo and blood draw so if you take your Levo in the morning then delay until after the test, or if you take it at night then delay that dose until after the test. These are patient to patient tips which we don't discuss with doctors or phlebotomists.
Other medication at least 2 hours away, some like HRT, iron, calcium, vitamin D or magnesium at least four hours away from Levothyroxine
Many people find Levothyroxine brands are not interchangeable.
Once you find a brand that suits you, best to make sure to only get that one at each prescription. Watch out for brand change when dose is increased or at repeat prescription.
Many patients do NOT get on well with Teva brand of Levothyroxine. Though it is the only one for lactose intolerant patients
75mcg is very low dose for someone after thyroidectomy
Your GP is wrong to say TSH of 2.4 is fine. It's far too high for someone with no thyroid
Official NHS guidelines saying TSH should be between 0.2 and 2.0 when on Levothyroxine
(Many of us need TSH nearer 0.2 than 2.0 to feel well)
See a different GP and request 25mcg dose increase in Levothyroxine and bloods retested 6-8 weeks later, including vitamin D, folate, ferritin and B12
All thyroid blood tests should ideally be done as early as possible in morning and fasting. Do not take Levothyroxine dose in the 24hours prior to test, delay and take immediately after blood draw. This gives highest TSH and lowest FT4. (Patient to patient tip, best not mentioned to GP or phlebotomist)
For full Thyroid evaluation you need TSH, FT4, FT3 plus TPO and TG thyroid antibodies and also very important to test vitamin D, folate, ferritin and B12
Private tests are available. Thousands on here forced to do this as NHS often refuses to test FT3 or antibodies
Medichecks Thyroid plus ultra vitamin or Blue Horizon Thyroid plus eleven are the most popular choice. DIY finger prick test or option to pay extra for private blood draw. Both companies often have special offers, Medichecks usually have offers on Thursdays, Blue Horizon its more random
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