Thanks guys. She's having this b/c her thyroid has been fuckd up all her life. She was prescribed 150mcg synthroid and the past two bloodtests showed her TSH has been on the low end. The dr. said its very rare to be on the low end at such a young age, so he's having her get a MRI on the pituitary(she already had a thyroid mri and was fine). He bumped her dose down to 112mcg as well.