K.H.
You have already gotten some good advice. I would be curious to know what school district you are in. I am a teacher, and I taught special education for 8 years. Schools CAN NOT refuse your child services based on the fact that he is unmedicated. The diagnosis alone is enough. You must do what you believe to be right. I understand that as a mother. However, I do suggest you also investigate some of the newer medications that are non-stimulant. Many of the problems you mentioned are related to the stimulant (not sleeping and eating) component of these meds. I do encourage you to continue to advocate for the services your child needs. That is your job as a parent. If you need to, contact the district office for special education. Often, there are also parent advocacy groups to help you with advice as to you and your child's rights. I am new to this area, so I can't recommend a specific one, but I know they are out there.
Good Luck.