Dear Ma’am
There is no side effect of long term thyronorm use.
The important thing for you is to take it first thing in the morning on an empty stomach and not have anything else for 30 mins after. Especially
calcium and iron supplements.
It interacts with acid suppressing medications too.
For your mother please send an online consult to me. It is not related to your problem at all.
Next Steps
You can send me blood results and medication on online consult if interested.