I also have extreme dry throat and dry mouth lately and although I have not come across these as side effects of too much thyroid hormone, I am as close to certain as I can be that my symptoms are from having my dosage of levothyroxine increased from .075 to .100 I complained of this side effect to my doctor, among other side effects like feeling more anxious, not sleeping well and light period and she lowered the dose to .088 which i started taking a couple days ago. I hope my dry throat disapears it is so aggravating!
I never had the dryness you mention, but I had a LOT of other symptoms while on Levoxyl. I then found out why when I read the stop the thyroid madness website! I switched to Armour and never looked back. Levoxyl is only T4, a storage hormone. Armour contains exactly what your own thyroid contains--T4, T3, T2, T1 and calcitonin. Made a HUGE difference in my life. Doctors don't get it so the website teaches you about it. Also, you will learn that the TSH lab test is LOUSY. www.stopthethyroidmadness.com
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