As most of you know, T3 is much more expensive than T4. To compare the two, here are average prices from pharmacies near where I live, for both T3 and T4 made by Pfizer/King.
Cytomel 25mcg 100 $189.82
Levoxyl 25mcg 100 $31.76
That is a factor of ~6 difference. Does anyone know if the diff is due to liothyronine synthesis really being more difficult/expensive, high cost of low-volume manufacturing, or just BigPharma greed?