Mon. Oct. 9, 2006 I have been taking Prometrium for hyperplasi...

Yes, I have experienced remarkable thinning of my hair as well. I asked my gyn and endocrinologist why, had hormone/thyroid/etc tests done, but no reason as far as they are concerned. Looking back, it may have begun around the time I began prometrium. I have been on it for a while, and my once very thick hair is very thin - even my husband has expressed concern about how much hair loss I've experienced. However, the doctors have not attributed it to prometrium or anything else... I think I need to specifically ask if Prometrium is the culprit.