1. Hello,
    Does anyone know of any clinical circumstances where one would increase a pt's dose of Synthroid for a low TSH? (low, as in, <0.5)
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    About kanzi monkey

    Joined: Mar '07; Posts: 654; Likes: 889
    from US
    Specialty: 5 year(s) of experience


  3. by   7student7
    There is controversy over the proper limits for TSH - some say .3 is the lower limit. It also depends on the lab - not all are the same. I know there are a few types of central hypothyroidism that work differently that the common hypothyroidism. Maybe in this case the TSH was just irrelevant and there were other indicators of a hormone deficiency. I'm not an expert though. I just have thyroid problems myself.
  4. by   brillohead
    Fellow thyroid patient here as well.

    TSH is not the end-all and be-all of thyroid hormone. If the pituitary has a problem, TSH may not be released even when needed.

    Checking FT3 and FT4 is needed in conjunction with TSH testing to get an accurate picture of what's going on.