Objective: To examine common signs and symptoms of mild to moderate carbama
zepine (CBZ) overdose in young children.
Methods: The medical records of previously healthy children admitted to the
pediatric departments for acute accidental CBZ poisoning during the years
1993-998 were evaluated retrospectively. Information was retrieved on serum
CBZ levels, signs and symptoms on admission and during hospitalization, EC
G findings, and chemical laboratory test.
Results: There were 14 exposed children all under the age of 5 years, These
children accidentally took CBZ prescribed for a family member. The diagnos
is of CBZ poisoning in seven children was unknown on admission because of i
nadequate history and was revealed only an toxicology screen. Nystagmus and
drowsiness occurred in 8 of the 14 children, nystagmus and ataxia in 4 chi
ldren, and drowsiness and tachycardia in another 2 children, The peak CBZ s
erum levels in these children ranged from 18 mu g/ml to 32 mu g/ml, mean SD; 25 mu g/ml + 4.64 mu g/ml (therapeutic range: 5-10 mu g/ml).
Conclusion: Based on a certain group of young pediatric patients with mild
to moderate CBZ poisoning, it is concluded that, nystagmus is the mast comm
on sign of this overdose. Other common signs are drowsiness and ataxia. The
presence of nystagmus and CNS depression of unknown etiology, in a young c
hild should suggest the possibility of CBZ toxicity.