What to you think about putting children on add medication is misbehaving at home?

Bad idea. Add medications should be used to treat add. However, there are children who misbehave due to impulsivity (reacting prior to thinking). Impulsivity can be treated with medication. I would strongly consider consulting with a child psychiatrist for child therapist to investigate your options.
ADHD is a neuro- developmental disorder with significant symptoms of Inattention &/or Hyperactivity/Impulsivity that start before age 10, last at least 6 mos. & harmfully impact academics, behavior &/or peer interaction at school & at home. Take a Positive Behavioral Supports parenting class, read "Little People" by Christopherson & ask pediatrician for referral to behavioral therapy/ behavior management training.