I started with Armour Thyroid 15, then increased dose to 30 and started to have slight swelling of my fingers. When dose was increased to 60, swelling become worst, started to have some weird muscle pain, joint pain, appetite increased. I asked my doctor to switch to Levothyroxine and ALL my symptoms disappeared after 3 doses. Armour Thyroid is not natural for humans, but it's natural for pigs. I am glad I switched to Levothyroxine. I should do it earlier.