Yes, she's too young -- these meds aren't approved for people that young, though doctors can prescribe them. Her brain is still developing. These drugs aren't even recommended long-term for adults, so imagine if this becomes, as mentioned above, the med merry go round. I'd stick with therapy and realize that all 13 year olds are nuts in some way that sometimes lasts but usually doesn't. Remember, the meds aren't going anywhere -- they'll always be there in case nothing else works.
hard to say once your on the med go round its hard to get off , so is it one more problem