Same type of question was asked in another NBME where I still got it wrong but I believe I understand what they are getting at now.
overdose on levothyroxine: that means too much T4, which has the ability to convert to T3 peripherally. So in that case Free Thyroxine AND Free triiodothryonine will be up. (There is no reason for T3 in this scenario to be decreased)
overdose on triiodothyronine: Too much T3, which cannot convert back to T4. Recall, T3 is more potent than T4 and will downregulate TRH release from hypothalamus. TSH be decreased but so will T4.
Jsut to be scrtlay lreac sabeec(u eI'v egtont ermo tihrody sixa tisuqsone owngr atnh I :s)duohl
4T g-t;-& T3 is osplbeis ubt T3 g-&t;- 4T ?sitn'
I get seh leobdud hre nihoerovetlxy deso aeceusb of igteuaf. I egt hatt THS si cr.seedade But hwy si eref T4 cedarseed adn efre 3T ad?reincse dWlunot’ htbo refe 4T nad feer T3 be dcas?enier