This reminds me of something that happened when my son was little.
One day his dad and I got a call from the preschool asking for us to come in for a meeting. When we arrived, most of the school staff was in on the meeting. They told us we needed to get our son 'evaluated'. He was exhibiting behaviors they didn't understand.
We took him for evaluation, and were referred to a psychiatrist. He wanted to prescribe a mood stabilizer. He said our son's behavior didn't fit any specific diagnosis, but that he wouldn't be surprised if he was diagnosed as bi-polar or schizophrenic when he got older.
My son's dad was very nervous about giving our son meds. Ritalin was something that was used a lot at that time, and he somehow talked the doctor into prescribing that instead.
We had about a week of hell. Our son lost control repeatedly, window panes in french doors were broken. He was switched to the mood stabilizer after that.