autism
"My stepson is now 13 years old and has been on 5mg dosage of Abilify for about 2-3 years.  We discovered it when we saw a commercial for a study involving autistic children with aggressive tendencies.  Since then, his behavior has improved 100% at both home and school.  The only side effect, as mentioned by others, is weight gain.  To this I say, take a more active role in your kid's diet and force him/her to exercise.  This will offset the side-effects while still reaping the benefits."