Low TSH Low TSH | allnurses


  1. 0 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)
  2. 2 Comments

  3. Visit  7student7 profile page
    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. Visit  brillohead profile page
    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.
    scoochy likes this.