welcome to Healthcare Magic.
It is sad to read about your child condition. I can understand your apprehension related to treatment. Autism
is frequently associated with behavior problems, mental retardation and seizures.
Although medicines do have side effects but while giving we have to do risk benefit analysis. Seizures requires long term treatment and medicines side effects need to be monitored during follow up visits. There is no issue, giving anti seizure medicine for long term under neurologist
Wish you all the best.
Dr Ashish Kumar Mittal