Question: I am on Synthroid for a hypothyroid condition but I feel it doesn’t work as well as the drug I used for many years called Armour. Is there any problem in switching back? What do you think of these two medicines?

Dr. Cwynar's answer:
Synthroid has one type of thyroid hormone in it called T4. The body then converts T4 into T3, which is the usable form. Armour has T3 in it as well as T4. Therefore, not as much of it needs to be converted. Most people feel more energized on Armour. There should be no problem switching back. Talk to your doctor about it.