The behavior you are describing should be of concern, and it is likely fueled by the impulsivity that is a component of her ADHD
. There are three aspects of ADHD
(though not all children who display this diagnosis display all three aspects): inattention, hyperactivity and impulsivity. Of the three, treatment (with medication) has the least impact on impulsivity. Continue to set the firm limits you are setting, and implement a standard consequence for any violation of the limit.