Recent studies suggest that serotonin reuptake inhibitors are helpful
in at least some symptoms of autism. Inositol is a precursor of the se
cond messenger for some serotonin receptors, and has been reported eff
ective in depression, panic disorder and obsessive-compulsive disorder
. However a controlled double-blind crossover trial of inositol 200 mg
/kg per day showed no benefit in 9 children with autism. Since biochem
ical studies suggest that inositol may augment serotonin effects, futu
re studies could evaluate inositol in children already receiving serot
onin reuptake inhibitors.