They do have these people in public schools they are called counselors.
As for the drug thing, I've seen them fail and I've seen them work well. And yes, there are side affects and you should definitely ask the doctor and research it before administering it to your child/children.
However, the parents being ignorant of their child's well being and having the child die, resulting in the parent(s) being charged with manslaughter and negligence, should not be your basis that all home schooled children end up that way. or that all parents need someone or a group of people telling them what they can and cannot teach their children and how to raise them.