I was having usual symptoms of hypothyroidism - fatigue, weight gain, dry skin, hair loss, etc. Have been on Levothyroxine for several months now and have seen improvements in all symptoms except hair loss. I'm also on Plavix (due to a TIA), which I understand can also cause hair loss. I started on it shortly before beginning to exhibit thyroid symptons. I've had breast cancer, so can't take estrogen.