If you have taken 10mg today, you are certainly fine to take another 10mg. There are no bad side effects of taking both at the same time otherwise I wouldn't be prescribed both..I've asked. ( I am allowed 60mg addies and 6mg xanies daily but rarely take all that) I like to take 1mg of xanax per 30mg of adderall. I get the focus and energy of the addies without the jitteryside effect sometimes associated with them. They don't counteract, however, if I want the full effect of one or the other I don't take at the same time or even on the same day. Hope that helps.