I cannot imagine anyone who works in a school setting insisting that a child be on medication. That, IMHO, would only be done by people who are very unprofessional. I would never think of telling a parent that their child needed to be on medication. The closest anyone in my (former) school district would get to insisting on medication is suggesting that they be evaluated by a medical doctor who specializes in pediatric medicine. That suggestion would come from the nurse, guidance counselor, or school psychologist. The only role a teacher would have is to complete a checklist provided by the doctor via the parent to describe classroom behavior.
Only one time did I discuss medication w/ a parent & it was only when she, a RN, asked for my opinion & assistance in convincing her son to give medication a try. He had already been evaluated & diagnosed w/ ADD. I was tutoring him & he was not one of my own students. It was all discussed in the family home, never at school. This young man was in middle school, very disorganized (pretty typical of boys this age), likeable, personable, yet his grades did not reflect his ability. He resisted because he did not want to "be a zombie" or "change my personality". He gave it a try & was the same young man but not all over the place w/ his focus. This C/D student went to A/B in a matter of weeks.
Every teacher & school district should adapt to the needs of the child to help them learn. They need to work w/ the parent, NOT tell the parent what to do, & certainly should not insist on medical intervention. Suggest an evaluation... OK. Anything else, again IMHO, is out of line.