<s>[INST] I am 48 yrs old. 5ft. 6 inch, 263 lbs.  I have hypothyroidism and have been on synthroid since 2004.  I have recently tried armour to try to feel better and possibly lose weight.  I feel strange on the armour like I wake up and I can feel heaviness on my chest more on left side and have to take deeper breathes. I also have felt loopy and like Im going to faint but havent felt that way since I stopped taking it 2 days ago.  My chest still feels tight and my neck/throat still feels tight and Im exhausted.  Takes every bit of energy to function.  I hope I feel better soon.  What are your thoughts? [/INST] Thanks for your question on Healthcare Magic.I can understand your concern.Your all symptoms are mostly due to armour drug.Armour is not US FDA approved drug.It can interact with thyroid hormones and synthyroid drug.So in my opinion, you should first get done thyroid function test (TSH, free T3 and T4).You may need change of dose of synthyroid to normalize your thyroid hormones.Once your hormones are normalize, you will be alright.Better not to take such drugs again.Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>