Hair Loss from Thyroid Gland?

Hello Doctor,
I have had male pattern hair loss for about two years and now am a class 3 patient. I have been taking proscar for about 6 months and I still lose hair. I would like to know if my hair loss may be caused by hyper, or hypo-thyroidism? How can I find out if it is my thyroid gland? Also, how long should I wait for proscar to start working?

You need to see a doctor who can perform blood tests for thyroid issues. Finasteride (Propecia / Proscar) generally takes about 6 to 12 months for one to see some results, but it should be noted that these results may be only a cessation of hair loss. If you do have a thyroid problem, then hair loss associated from it will not abate until you tackle the thyroid problem. Generally, thyroid problems will produce hair loss all over your scalp and not in a Norwood Class 3 pattern.