Autism Clinical Trial
Official title:
An Open-Label Study of the Safety and Tolerability of Memantine in Pediatric Patients With Autism, Asperger's Disorder, or Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS)
The purpose of this study is to evaluate the safety and tolerability of memantine in pediatric (6-12 years old) patients with autism, Asperger's Disorder, or Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS) and to identify responders for participation in a follow-up randomized withdrawal study.
This 50-week multicenter and multinational clinical study is comprised of a 2-week screening
period, a 6-week open-label dose-titration period followed by a variable duration
maintenance period (up to 42 weeks).
Patients with at least 12 weeks of investigational product exposure who meet the protocol
specified responder criterion at two consecutive visits separated by at least two weeks are
eligible to transition to a randomized withdrawal study. A responder is defined as a patient
who demonstrates at least a 10 point improvement (reduction in score) in the Social
Responsiveness Scale (SRS) total raw score relative to the Visit 1 total raw score.
Weight based dose limits were selected in this study to ensure that exposure in terms of
area under the curve (AUC) was less than the predefined limit of 2100 ng·h/mL which
represents a 10-fold lower exposure than observed at the No observed adverse effect level
(NOAEL) of 15 mg/kg/day in juvenile rats.
The weight-based dose limits in this study were as follows:
- Group A: ≥ 60 kg; maximum 15 mg/day
- Group B: 40-59 kg; maximum 9 mg/day
- Group C: 20-39 kg; maximum 6 mg/day
- Group D: < 20 kg; maximum 3 mg/day
;
Endpoint Classification: Safety Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
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