I have to jump in on this one.
DO NOT GIVE A 14 YEAR OLD CHILD XANAX, KLONOPIN OR ANY OTHER OF YOUR DRUGS!!! 
It's not your place or your right to be handing out your drugs to a child and it's rightfully against the law.

If she needs medication then she needs to see a dr. Doesn't matter if you have good intentions. You could be messing up this kid for life doing that.
It's one thing if you want to take a bunch of benzos (I don't care what you take), get drunk while you're supposed to be detoxing, black out and write crazy illegible posts on the forum, etc. But I'm serious here that if I personally knew of an adult giving a 14 year old benzos or any other drugs then I would turn that person over to the authorities myself.

I would turn you in to the police if I knew you were giving a child any of your drugs. All she needs is to have you telling her that it's okay for her to take drugs like you do. I'm serious, don't do it.