Hypothyroidism and Levothyroxine dosage. Help please.

[DuplicateUserName]

I'm in my mid-fifties and I was diagnosed with an underactive thyroid 10 months ago.

I had blood tests every 6 weeks at first so the GP could get my Levothyroxine dosage right and when the dosage was too high, I'd get terrible heart palpitations every time I ate any kind of food until it was lowered a bit.

Anyway, fast forward to now and I've been on 75 micrograms daily for almost 3 months and I've never felt better (blood tests are also 3 monthly now). But for the last 2 weeks, the heart palpitations have come back.

So what I'm asking (and Google isn't really helping) is once you're on the correct dosage, is it very unusual for them to have to lower it? I'm thinking I must've been on the correct dose for almost 3 months, as I felt so well?

The only thing I'm getting from Google is that it sometimes has to be lowered if your weight fluctuates, but it hasn't.

Sorry, should've added, I've got a blood test next week so I'm sure all will be revealed but I'm just curious.

In the first two years we increased we lowered we increased we lowered we increased!!

now found my sweet spot at 100 and been like this for 3 years

I think you need to ask your GP to check your dosage but I wouldn’t necessarily assume the palpitations are related to that if you’ve been stable for a while now - they could be menopause related (especially if you’re late 40s onwards) or stress related.

Yes that's the thing that's confusing me because I thought I'd found my sweet spot, so I'm wondering why after nearly 3 months it turns out it's not? 🤔

That's true @Xrays about being menopausal

It's just that I've only ever experienced the heart palps once before and that was when the GP said my dosage was too high.

If your thyroid function was poor because of Hashimoto's, you can have times when your dose will be too high, because the thyroid will 'kick in' again for a while on and off.

Once your thyroid is fully burned out/eaten by antibodies, your symptoms will settle down and your dose can be stable.

It's worth speaking to your doctor.