any suggestions on a next step here? Other than to never use T3 again? do you think t4 will cause the same issues?
Stay away from thyroid drugs period!!
If you want help losing weight then give your thyroid what it needs to perform, which is iodone and selenium. Most pharmaceutical thyroid drugs are based on a toxic form of iodine anyway. Why not give your body a form thats safe and address the root cause of the problem?
Ever ask yourself why the japanese eat 5-12MGs of iodine a day have fewer thryoid problems (as well as breast cancer and many other things) than the US yet our government claims the upper safe dose of iodine is 400mCg (thats micro) daily?
Because so many in the medical community are snowed and ignorant about nutrition. They just want to prescribe pills.
Do yourself a favor and research iodine deficiency. Its quite the complicated rabbit hole with many claiming toxicity but the fact of the matter is in order to safely supplement iodine (which can easily be done) you need to use the right kind AND take appropriate additional supplements.
Iodine is also a halide and in its absence other toxic heavy metals such as bromide can bind to the receptor and exacerbate iodine deficiencies.
Im currently taking 50mg a day (yep, thats 125 times the max upper safe limit claimed by our government) iodine/iodide combination trying to replenish my bodies stores and push out other toxic halides. No negative effects to date but some pretty amazing benefits.