OH my! 150mcg levoxl and 50 mcg
cytomel is a lot higher dose medicine than the equivilant of 120
Armour, no wonder your having more palps!
Not only that, but the cytomel to levoxyl ratio is higher than most, seems to me you need less cytomel.
This is a rough estimate I have been on both types of meds (I am not a doctor).
120 Armour is about the same as 112 mcg synthetic T4 with 10 mcg cytomel per day.
Are you sure on the amount per day of old verses new meds you take?