After reading so much about Armour, earlier this year I decided that I would like to try it. I was actually feeling very good on Synthroid but wondered if I could feel even better. I was on Armour for a month and got very ill. Dizzy, legs swelling, hard time walking and standing. I went back to the Synthroid and it has taken me about six months to recover. I had a thyroidectomy about 3 years ago and never gained any weight until I was on the Armour, about 15lbs. My Endo says everyone is different with the meds. I really wanted the Armour to work out for me and will be hesitant to try anything else now because of my terrible experience.