Any pill made in the USA with FDA approval has identifying markings. That is true in all cases.
There is no way to tell what you have if there are NO markings of any kind. It could be something bought online manufactured and sold here illegally from another country such as India or wherever.
There is no way that I would take something like that or allow anyone else to do so. God bless.
I am not a dr. My statements are based on years of experience and related education. Consult with the professional of your choice regarding matters of concern.