What medication management strategies exist for children with neurodevelopmental disorders who respond poorly to stimulants and have intolerable side effects on antipsychotics?

Although neurodevelopmental disorders include ASD, ADHD, communication disorders, intellectual developmental disorders, tic disorders, and motor disorders, I will focus on ASD and ADHD, based on the question. And although the various stimulants and antipsychotic medications have different side effects and in a real-world scenario, based on actual patient symptoms and behaviors, I might try another antipsychotic if one or two appear to be intolerable for the patient, I will assume that all stimul...

What precisely are you trying to treat?