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Journal of Child Neurology
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Memantine as Adjunctive Therapy in Children Diagnosed With Autistic Spectrum Disorders: An Observation of Initial Clinical Response and Maintenance Tolerability

Michael G. Chez, MD

Department of Neurology, Rosalind Franklin University/The Chicago Medical School, Chicago, Illinois, mchezmd{at}yahoo.net

Quinn Burton, MS

Department of Neurology, Rosalind Franklin University/The Chicago Medical School, Chicago, Illinois

Timothy Dowling

Department of Neurology, Rosalind Franklin University/The Chicago Medical School, Chicago, Illinois

Mina Chang, MS

Department of Neurology, Rosalind Franklin University/The Chicago Medical School, Chicago, Illinois

Pavan Khanna, MS

Department of Neurology, Rosalind Franklin University/The Chicago Medical School, Chicago, Illinois

Christopher Kramer, MS

Department of Neurology, Rosalind Franklin University/The Chicago Medical School, Chicago, Illinois

Autism and Pervasive Developmental Disorder Not Otherwise Specified are common developmental problems often seen by child neurologists. There are currently no cures for these lifelong and socially impairing conditions that affect core domains of human behavior such as language, social interaction, and social awareness. The etiology may be multifactorial and may include autoimmune, genetic, neuroanatomic, and possibly excessive glutaminergic mechanisms. Because memantine is a moderate affinity antagonist of the N-methylD-aspartic acid (NMDA) glutamate receptor, this drug was hypothesized to potentially modulate learning, block excessive glutamate effects that can include neuroinflammatory activity, and influence neuroglial activity in autism and Pervasive Developmental Disorder Not Otherwise Specified. Open-label add-on therapy was offered to 151 patients with prior diagnoses of autism or Pervasive Developmental Disorder Not Otherwise Specified over a 21-month period. To generate a clinician-derived Clinical Global Impression Improvement score for language, behavior, and self-stimulatory behaviors, the primary author observed the subjects and questioned their caretakers within 4 to 8 weeks of the initiation of therapy. Chronic maintenance therapy with the drug was continued if there were no negative side effects. Results showed significant improvements in open-label use for language function, social behavior, and self-stimulatory behaviors, although self-stimulatory behaviors comparatively improved to a lesser degree. Chronic use so far appears to have no serious side effects.

Key Words: autism treatment • pervasive developmental disorders • memantine

Journal of Child Neurology, Vol. 22, No. 5, 574-579 (2007)
DOI: 10.1177/0883073807302611
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