First don't ask your Pediatrician they have an answer, medication and they aren't equipped to handle the emotional aspects of the medication.
Observe your child in class. Then you can teach him ways to handle his compulsion to talk, like learning sign language.
I've been having the same trouble, although my son is more physically aggressive.
In the class room I learned that my son does have impulses he cannot control, but he also has other children goading him and a teacher that doesn't have an intimidating voice or attitude.
We've struggled with weeks and weeks of daily behavioral reports, stripped him of every belonging and privilege even left him for hours in an empty room and nothing has helped. After one day in there I knew what our answer was.
My son is very advanced academically but too emotionally immature for school. I don't want to keep him home so we're going to find a medication to help him control his impulses. We will not be doing this through a pediatrician. We are going to have him monitored by a pediatric psychiatrist so she can evaluate him for depression or BiPolar when those feelings arise or are triggered by the medication.
After several pm's explaining my choice I am updating this. Since the 3rd week of school my husband and I have been been in a behavioral plan meeting with other staff members of the school system and have tried limiting his time in class, switching the teachers, changing the class room setting to just him and a teacher, nothing has seemed to work to control his lashing out at anyone who annoys him or makes him do something he doesn't want to do. We've had medical tests run after we invested in an herbal remedy and he had a bad reaction to it. We've tried supplements until they flared up his iron. We've done the things that Dr.Phil suggests and had brainwave patterns tested and we've chosen to go ahead with the medication to keep him from being the 19 year old that can't play football his sr. year because he's too old. We're using a medication that is tirated specifically for the chemical imbalances shown in his tests.
I am not advocating just sticking her child on any old medication.
I am saying there are several things she needs to evaluate before she makes the choice and where to go to actually get the medication that is appropriate not samples from the pediatrician that just happens to have them.