Adderall is a medication used to treat Attention-Deficit/Hyperactivity Disorder (ADHD), at initial doses of 5 to 10 mg daily in children aged 6 to 11 years, with possible dose increase of 5mg weekly, up to a maximum of 40 mg per day in 2 or 3 divided doses.
Seroquel is an antipsychotic medication that is not recommended in treating patients under the age of 18 years.
You should discuss your concerns with the child's doctor and/or consider seeking a second opinion from a psychiatrist with special training in child psychiatry, for re-evaluation of the child's diagnosis and medications.
I would get a second opinion; find a pediatric psychiatrist who has experience in treating younger children. Go to conductdisorder.com which is a great site for support and advice.
My son was taking imipramine and the psych also prescribed Luvox. The info with the Luvox said not to take it with the imipramine. The psych shrugged it off. We stopped the Luvox. You have to do what is right for your child. Doctors are not gods and do not know everything. You see your child nearly 24 hrs per day. They see your child at the most 15 minutes once per month.
Take care.