So for a short while I was taking Adderall with Ginkgo Biloba which seemed to help my memory but while taking this mixture I started having 2-5 nose bleeds a day. I have a very sensitive nose and I can get nose bleeds easily, I asked my doctor about this and she said "something something something, which may cause you to bleed for longer or cause more nose bleeds"
Just a personal experience but if you mix them and you start getting lots of nose bleeds you now know why :P

It would have been the Ginko: it can make you more susceptible to bleeding.