Hello Dr. My Son Is 7 Yrs Old, High Functioning

Hello Dr. My son is 7 yrs old, high functioning Autistic. On Prozac 4ml once daily, recently stopped Risperdol, also on catapress patch .3 changed every 5 days per his Neurologist @ CHOP. The last 4-6 weeks? or so has been excessive sleeping through school, sleeping as soon as he gets home and sleeping entirely through the night. Also has excessive thirst, with more urination, No change in color, maybe a slight darker, not much. He does snore, had sleep study with mild apnea. Still has tonsils and adenoids too. Went to pediatrician tonight and FBW ordered for tomorrow am. The sx's online keep showing up narcolepsy. Any other ideas what could be? Very anxious. Sincerely, Kelly A. (Bucks Co. PA)