Does synthroid (thyroxine) medicine makes your hair fall out, weight gain, moody, ?

Possibly: If you are taking too much synthroid (thyroxine) you could develop these symptoms of hyperthyroidism - you should have your physician check your thyroid levels (tsh, t3, t4).

Hypothyroid : No synthroid (thyroxine) does not cause those symptoms, you are describing hypothyroid symptoms. Synthroid (thyroxine) is used to treat hypothyroidism. I suspect that your symptoms are because you are not on enough. Go see your doc and get tested.