I took 2 doses of Finax 1mg accidentally. One at morning and other at night. Will this cause any problem for me?

Taking 2 mg in a 24 hour period for a single time will not cause any additional issues over taking just 1 mg. However, whenever a patient uses a dose that was not intended, the prescribing physician should be notified. 

Hi thereTaking by accident double dose of finasteride should not be an issue I would let your doctor know if you have not told him yet.

An extra 1 mg Finasteride taken once will not have any appreciable impact. A different question is whether you should take Finasteride at all. It does have severe sexual side effects in a few percent of patients but taking even that small risk may be a bad bet. This would not be my first choice in a pharmacological approach. I would prefer Minoxidil, LLLT and PRP as alternatives.