Anyone out there who can help me ? I have had an underactive thyroid for fifteen years now and NEVER felt well on the synthetic drug thyroxine, so last year to my surprise my doctor let me try Armour, she prescribed 1/2 grain. I was on 100 mcg of thyroxine, after about two weeks of taking Armour I developed extreme panic attacks which frightened the life out of me, so decided to go back to thyroxine, it has taken me at least nine months to get back to 100mcg of thyroxine because it causes hyper symptoms so I have to gradually take it having said that I am not fully on 100mcg yet. I am so confused now my doctor does not know alot about Armour so she is not much help. Is it possible to take thyroxine with Armour so you can slowly taper of the synthetic drug and gradually increase Armour, I think my body just reacted badly because I was on 100mcg and then suddenly dropped to 30mg of natural thyroid, as i said before I have never faired really well with the synthetic so am desperate to change.