Journal
JOURNAL OF CHILD NEUROLOGY
Volume 26, Issue 1, Pages 109-112Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/0883073810377235
Keywords
hyperammonemia; Indian; metabolic; encephalopathy
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This cross-sectional study was planned to study the blood ammonia levels in epileptic children on 2 dose ranges of valproic acid monotherapy. A total of 60 epileptic children aged 3 months to 12 years, that were on valproic acid monotherapy for at least 3 months, were enrolled and divided into 2 groups, a low-dose group (dose, 20-39 mg/kg/d [n = 32]) and a high-dose group (dose, 40-60 mg/kg/d [n = 31]). Measurements of blood ammonia, serum valproic acid levels, and liver and renal function tests were performed. Blood ammonia levels were significantly higher in the high-dose group (median, 79.2 mu g/dL; range, 55.23-114.29 mu g/dL) as compared with the low-dose group (median, 47.2 mu g/dL; range, 20.62-73.25 mu g/dL). Blood ammonia levels significantly correlated with both the dose (r = .77, P < .001) and serum levels (r = .88, P < .001) of valproic acid. All the children with hyperammonemia were asymptomatic. There were no significant differences in the other biochemical parameters between the 2 groups.
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