Hi,
When we started Concerta 18 mg (lowest dose) for my 9 year old daughter she became way more talkative at first. We tried going up to 27 mg and this has helped a bit. I’m not sure if the improvement will last but we are starting therapy soon so hoping that helps. She has always had a problem with speaking out of turn and interrupting. Maybe play around with the dose of your daughter’s meds or try a different type of stimulant. Good luck!