I've always had a cough (like a tickle as the best way to describe it) the entire time on was on both name brand Synthroid and
. I tried WP Thyroid for 6 week trial and
it disappeared along with the nagging symptoms. My doc didn't like my T3 numbers and switched me back to levothyroxine with 5mg of cytomel (T3 drug) despite feeling more normal. Within 2 days of being back on levothyroxine, the cough returned, the fatigue, the brain fog, the insomnia, etc.