A member asked:

Free t3 was 2.051, t3t 76.t4 & tsh in range. added 5mcg cytomel to 75mcg synthroid (thyroxine). still temp. sensitive, but *really* anxious. stop cytomel?

2 doctors weighed in across 2 answers

Stop cytomel (liothyronine): how long after taking cytomel (liothyronine) , did you get the levels taken?----all of your labs are essentially normal. but it take about 30 days before thyroid meds will affect the lab values... but sice cytomel (liothyronine) is synthetic T3----and the symptom of too muc T3 is anxiety---- eith stop the cytomel (liothyronine) or use 1/2 the dosage--- and see if it helps----follow up with your private doctor

Answered 8/11/2014

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Dr. Carrie Cannon answered

Specializes in Family Medicine

See doctor/Endocrine: It's possible that you do not convert T4 to T3 very well. Consider lowering your Synthroid (thyroxine) dose with your doctor's collaboration. T3 is 4 times more powerful with a short half life (some state 4 - 8 hours up to 1 day) compared to the T4 half life of 5 - 7 days. More commonly a smaller dosage of T3 added to existing T4 is given, but perhaps you need a lower dose of Synthroid (thyroxine).

Answered 2/27/2016

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