Your
TSH is elevated , so dose adjustment is needed, but it should be done gradually, not directly jumping to 100 mcg.
Usually we increase first, then recheck TSH after 8 weeks.
Sudden increase to 100 mcg may cause side effects like palpitations.Take tablet on empty stomach. No food for 45 mins after. Avoid
calcium or iron near dose
Weight gain can be due to uncontrolled
thyroid.
Better to adjust stepwise and monitor.
You can book a consultation with reports for proper dose planning 👍