TSH 0.3 so why have I been given levothyroxine?

[treeelights]

I'm a little bit confused.

I have a low TSH = overactive thyroid

So why has my doctor prescribed me 100mg of levothyroxine? Isn't that only prescribed for people with UNDERactive thyroids??

Usually yes it is prescribed for UAT. TSH 0.3 isn't necessarily over-active, depends on the scale the lab uses; but I agree it is low in the range.
Seems odd, What reason did your GP give?

Sounds very odd!
I had overactive a few years ago she was sent for more tests then two years ago became underactive (hashimotos) and was put on levothyroxine

Have you asked the prescribing doctor?

When my thyroid was over active they gave me huge doses of propylthiouracil for my overactive thyroid and then regulated it with Levothyroxine to bring it into range. BUT I had undetectable TSH and FT3 and FT4 that were off the scale.

What were the rest of your blood results?

Hmm. The results of my blood test weren't given to me. Just that they were 'normal'.

I wonder if it's because I have all the symptoms of an underactive thyroid - literally every single one. So the doctor has gone with that... rather than the TSH level which indicates an overactive thyroid.

This is all new to me and I've been researching for the last hour so the seeming contradiction didn't even occur to me when I was in the clinic!

How bizarre...?

Yes, I think you need more information tbh.

A suppressed TSH needs to be seen in context with your other results.

Have you had treatment for any kind of thyroid condition in the past? Surgery? Or radiotherapy??

You need to ask your GP (if you are in the UK) who should be able to look at blood results even if they were taken in hospital.