Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Safety Study of Memantine in Pediatric Patients With Autism, Asperger's Disorder or Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS)

This study has been terminated.
(Terminated because primary efficacy parameter failed to demonstrate statistically significant difference between memantine and placebo in controlled trials)
Information provided by (Responsible Party):
Forest Laboratories Identifier:
First received: May 3, 2012
Last updated: January 30, 2015
Last verified: January 2015
The objective of this study is to evaluate the long-term safety and tolerability of memantine in the treatment of pediatric patients with autism, Asperger's Disorder or Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS).

Condition Intervention Phase
Autism Spectrum Disorder (ASD)
Autistic Disorder
Asperger's Disorder
Pediatric Autism
Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS)
Drug: Memantine Hydrochloride (HCl)
Phase 2

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: An Open-Label Extension 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)

Resource links provided by NLM:

Further study details as provided by Forest Laboratories:

Primary Outcome Measures:
  • Patients With Any Treatment-emergent Adverse Event [ Time Frame: Visit 1 (Week 0) up to 30 days after Visit 8 (up to Week 48) or Final Visit ]
    Number of patients who experienced 1 or more Treatment Emergent Adverse Event

Enrollment: 747
Study Start Date: October 2012
Study Completion Date: March 2014
Primary Completion Date: January 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Memantine

To maintain the blind of the preceding study, patients who participated in MEM-MD-68 (NCT01592747) began this study with 6 weeks of double blind dosing during which all patients were either titrated to or remained on their maximum target dosages. This was followed by up-to 42 weeks of open-label dosing.

Patients who took open-label memantine in study MEM-MD-67 (NCT01999894) or MEM-MD-91(NCT01592786), received up to 48 weeks of open-label memantine at their maximum tolerated weight based target dosage.

Drug: Memantine Hydrochloride (HCl)

During the 6-week double-blind dosing titration/maintenance period, Memantine extended-release 3-mg and 6-mg capsules; oral administration. Dosing was once daily.

During open-label treatment: Memantine extended-release 3mg capsules; oral administration. The maximum target dosage was identified during the prior studies for each patient. Dosing was once daily.

Other Name: Namenda

Detailed Description:

This clinical study was a 48-week, multicenter, multinational, open-label extension study in pediatric outpatients with autism, Asperger's Disorder, or PDD-NOS conducted at 106 study centers. Patients were eligible for this long-term extension study if they had:

  • completed the open-label Study MEM MD 67,or
  • completed the open-label Study MEM-MD-91, or
  • completed the double-blind Study MEM-MD-68, or
  • discontinued study MEM-MD-68 by meeting requirements for loss of therapeutic response

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

The decision to close the study early was based on data from 2 double-blind placebo-controlled studies (MEM-MD-57A and MEM-MD-68) that failed to demonstrate a statistically significant difference between memantine and placebo in the primary efficacy parameter based on Social Responsiveness Scale (SRS) total raw score.


Ages Eligible for Study:   6 Years to 12 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients who completed Study MEM-MD-67, MEM-MD-68, MEM-MD-91, or discontinued Study MEM-MD-68 due to meeting the criterion for loss of therapeutic response.
  • Having normal results from a physical examination and laboratory tests at Visit 1 of this study (last visit of the preceding study). Any abnormal findings must be deemed not clinically significant by the Investigator and documented as such.
  • Have a family that is sufficiently organized and stable to guarantee adequate safety monitoring and continuous attendance to clinic visits for the duration of the study

Exclusion Criteria:

  • Patients who discontinued a preceding memantine study due to an adverse event possibly related to study drug
  • Patients with a concurrent medical condition that might interfere with the conduct of the study, confound interpretation of the study results, or endanger the patient's well being
  • Significant risk of suicidality based on the Investigator's judgment, Aberrant Behavior Checklist-irritability subscale (ABC-I), or if appropriate, as indicated by a response of "yes" to questions 4 or 5 in the suicidal ideation section of the Children's Columbia-Suicide Severity Rating Scale (C-SSRS) or any suicidal behavior
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01592773

  Show 106 Study Locations
Sponsors and Collaborators
Forest Laboratories
Study Director: Jordan Lateiner, MS, MBA Forest Research Institute, Inc.- A Subsidiary of Forest Laboratories, Inc.
  More Information

Responsible Party: Forest Laboratories Identifier: NCT01592773     History of Changes
Other Study ID Numbers: MEM-MD-69
Study First Received: May 3, 2012
Results First Received: January 30, 2015
Last Updated: January 30, 2015

Keywords provided by Forest Laboratories:
Autistic Disorder
Asperger's Disorder
Pediatric Autism
Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS)
Pervasive Child Development Disorder

Additional relevant MeSH terms:
Autistic Disorder
Autism Spectrum Disorder
Developmental Disabilities
Asperger Syndrome
Child Development Disorders, Pervasive
Pathologic Processes
Neurodevelopmental Disorders
Mental Disorders
Antiparkinson Agents
Anti-Dyskinesia Agents
Dopamine Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Excitatory Amino Acid Antagonists
Excitatory Amino Acid Agents processed this record on May 24, 2017