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Thyroid UK
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Should I delay my blood tests


I posted last week re bad palpitations with increase of levo, I increased from 100mcg to 125mcg eleven weeks ago then increased to 150mcg 5 weeks ago. I then reduced to 125mcg last week as the palpitations and racing pulse were really bad and I was concerned I was over medicated. My bloods are due to be taken next week and then I see the endo the week after but as I reduced last week should I now cancel the test and wait another four weeks or so or still have it done just to see what is going on.

Many thanks browny

2 Replies

Hi browny, Normally with synthetic thyroxine treatment, it should be 5- 6 weeks between altering meds and a blood test. Otherwise you may get a false result.

Best wishes,



Thanks Jackie


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