Greetings. It's not that taking that tablet would be causing the problem. Infact you must have had hypothyroidism for some time and if I have understood correctly, it's been diagnosed recently. The insult to hair root during the time of hypothyroidism would make roots week. So as your hormonal levels stabilise, hair fall will stop and hair will regrow. Get
tsh levels checked every three months initially till the dose of thyronorm is stabilised. See a qualified dermatologist/ endocrinologist near you. Warm regards. Further queries may be sent on follow up messaging.