Optimum time for re-testing bloods: I want to go... - Thyroid UK

Thyroid UK

137,645 members161,423 posts

Optimum time for re-testing bloods

kteg1 profile image
2 Replies

I want to go for a re-test of my bloods as some symptoms seemed to have increased. It could be due to my not taking the tablet correctly so I need to maximise the opportunity for a true reading. Could I clarify? What is the minimum time you stay off eating in the morning in order to take your Levo so it can work effectively? Can you drink tea/coffee during this time ?And how long does it take to establish itself in the body once you start taking it correctly?

I think that I may have got into some bad habits over some weeks now , I have not left it long enough before eating, thus rendering my medication ineffective. So I need to rule that scenario out before I request a re-test of my bloods plus leave it long enough for the medication to really take hold.

Written by
kteg1 profile image
kteg1
To view profiles and participate in discussions please or .
Read more about...
2 Replies
Clutter profile image
Clutter

Karensims,

Levothyroxine should be taken with a glass of water on an empty stomach, one hour before, or two hours after, food and drink. Two hours away from supplements and other medication and 4 hours away from vitamin D, calcium, iron and oestrogen.

You will have been absorbing some of the Levothyroxine so it won't have been ineffective but perhaps not as effective as it could have been. 4 weeks should be long enough to improve absorption for retesting..

kteg1 profile image
kteg1 in reply to Clutter

Thanks Clutter for the clarification

You may also like...

Advice re blood tests

appointment on 17th just had blood tests on tue for hospital and medicheck ones recommended on...

Re Thyroid Blood Tests

paying for all Bloods to be done by the Private Endo... Will post latest Blood Tests that I have...

Timing of NDT for blood test

that I don't eat until after the blood test, as i might find doing the finger prick test difficult...

NDT blood test timing

NDT you should test 12 hours after your dose. Is that correct? If so at that point is the blood test

Blood tests - time taken

How long does it take for basic blood tests to be done in the community and for the results to...