Update

[Sleepyachy]

Hi everyone , haven't been on in a while.

Sorry to who I sent a rant to . Instead of posting to all. Sent to a member.

Well my rant was , been feeling rubbish for abit, had bloodtest Monday. Got results , finally out of range! Spoke to doc he's upping dose from 100 to 150 , fingercrossed start feeling some what normal again .

[SlowDragon Administrator]

What were your thyroid and vitamin results and ranges

Even if GP has increased by 50mcg, recommended to only increase by 25mcg initially

Many/most find 50mcg increase too much to tolerate in one go

Increase dose by 25mcg and retest after 6-8 weeks

Which brand of levothyroxine are you currently taking

Do you always get same brand

Important to regularly retest vitamin D, folate, ferritin and B12

What vitamin supplements are you currently taking

[Sleepyachy in reply to SlowDragon]

Yes on same brand

OK

[Sleepyachy in reply to Sleepyachy]

Was going to go by 25 but then we both decided to go up 50 .

[SlowDragon Administrator in reply to Sleepyachy]

So have you started on 50mcg extra or on 25mcg initially

[Sleepyachy]

No going from 100 to 150 straight off

[Sleepyachy]

I'm nearly 6ft and feel that height and weight should be considered too

[Sleepyachy]

I did ask what the higest dose was and said 200, 300

[helvella Administrator Thyroid UK in reply to Sleepyachy]

If that is the case, he is clearly badly informed.

There is no absolute maximum dose. A standard phrase used in the Summary of Product Characteristics documents for levothyroxine in the UK says: The final daily dose may be up to 50 to 200 micrograms.

But there is plenty of evidence some need more. Especially if the person has issues which impact absorption.

There is even a documented case of someone who was taking over 3000 micrograms a day - with no signs whatsoever of overdosing.

And in some countries, such as the USA, you can even get tablets in 300 microgram dosage.

Regarding height and weight, you might care to read my documents:

helvella - Estimation of Levothyroxine Requirement in Adults

A discussion about the use of formulas to estimate levothyroxine dosing.

From Dropbox:

dropbox.com/s/gzeknihf815rb...

From Google Drive:

drive.google.com/file/d/1Zs...

A spreadsheet with several active formulas which work out possible levothyroxine requirements including NICE NG145 guidelines. These formulas are referred to in the document above.

This is an Excel spreadsheet but is likely to work in other spreadsheet software.

From Dropbox:

dropbox.com/s/aciho6m7x6f1e...

From Google Drive:

docs.google.com/spreadsheet...

[Sleepyachy in reply to helvella]

Well I see how I get on . On 150 . Obviously if any bad side effects will cut down. I'm hoping to feel more my age than 90