FDA Thyroid Update

Conversion Table

As a reference, the following table includes the amounts of T3 (Liothyronine) and T4 (Levothyroxine) that were in Armour Thyroid and NP Thyroid.

Strength of Armour Thyroid or NP Thyroid
T3 (Liothyronine)
T4 (Levothyroxine)

15 mg (1/4 gr.)

2.25 mcg

9.5 mcg

30 mg (1/2 gr.)

4.5 mcg

19 mcg

60 mg (1 gr.)

9 mcg

38 mcg

90 mg (1½ gr.)

13.5 mcg

57 mcg

120 mg (2 gr.)

18 mcg

76 mcg

180 mg (3 gr.)

27 mcg

114 mcg

240 mg (4 gr.)

36 mcg

152 mcg

300 mg (5 gr.)

45 mcg

190 mcg