need help with my medicarion! please help!?

I was diagnosed with hipothyroidism 5 yrs ago I've been taking levothiroxine 75 mcg they increased mcg no more than 2 yrs ago. I'm loossing a lot of hair I know that this may be a side effect . They checked my level a month a go and they are ok. I bought vitamins to stop hair loss called Hair ReVive but they contain L- Tyrosine .can I take them? Or what else can I do to stop hair loss ? Please help thank you!