If he has a history of central or obstructive sleep apnea, his sleep may not be restful if his oxygen saturations are dropping and/or if he awakens frequently. In looking up Tegretol in the drug reference book, it can cause drowsiness, although I have never heard of a patient being "knocked out" by it before! Perhaps his level should be checked. I think that he may be awakening during sleep, either because of oxygen "hunger" possibly due to obstruction, or something related to his seizure disorder. I would suggest that they discuss this with a pediatric ENT specialist or the pediatric neurologist. A sleep study may be indicated
TK 7-13-10