I also take Metformin ... however, I was already taking this medication prior to my diagnosis of IIH. I take it for a condition called PCOS, polycystic ovarian syndrome. Which is possibly related to IIH, but they have not confirmed that officially, I don't think. Anyway, I wondered if maybe they put you on Metformin because your bloodwork or other testing/history showed signs of PCOS. Do you think that's possible?