Taking 3 Months off Propecia to Evaluate Hormone Levels

I’ve been taking propecia for nearly four years, and my endocrinologist would like me to take 3 months off of it to evaluate some hormone levels that were questionable at best, particularly low FSH.

My question is, can you take 3 months off propecia without any harm being done? How long can I realistically go off it and be able to take blood tests without the finasteride having any impact on the tests – is it 3 months or less? I have read that the half-life of propecia is less than a day so, ideally, couldn’t I take blood tests after, let’s say to be safe, a month and it’ll be okay?

Thanks in advance!

If you were actively balding and taking Propecia for a long time, then stopping it for 3 months can produce “catch up” hair loss in that time frame. I am not an endocrinologist nor your doctor. You should be address these concerns with your doctor. Maybe your doctor has his/her own reasoning.

I really don’t know your situation of low follicle-stimulating hormone (FSH) or why you are taking Propecia to evaluate hormone levels. Some of what you say makes me wonder if you are even balding or have androgenic alopecia. One thing that I do know is that the serum half life of Propecia is several hours (4 to 6 hours). I do not know what impact it has on FSH. Ask your doctor.