The dosage you are taking was fairly low, and now the doctor has switched you to
Armour, but the dosage is too low. Many
doctors misunderstand and think that the equivalent dose of Armour is one grain (60 mg) for each 100 mcg of T4 med. Unfortunately that is incorrect. The real equivalent is one grain for each 70 mcg of T4, so your new dosage is a reduction, when you needed an increase and I expect that you also need to raise your Free T3 level.