Please help. Returned to the doctors again recently. My latest symptom is hair loss on my scalp, I've lost my eye brows and body hair. I'm having another blood test and this particular doctor said she'll test for levothyroxine levels, iron and t3. The last too are new to me. I just thought my hypothyroidism was treated with levothyroxine. I had no idea there are other indicators or drugs that can treat it. Only since reading a few posts on this site have I realised its a lot more complicated than that. Can anyone fill in some more details for me. Thanks.