Memantine Augmentation of Antidepressants
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||A Randomized Double-Blind Pilot Study of Memantine Augmentation in Antidepressant Nonresponders or Incomplete Responders|
- Montgomery-Asberg Depression Rating Score (MADRS) [ Time Frame: Baseline & week 8 ] [ Designated as safety issue: Yes ]Higher MADRS score indicates more severe depression, and each item yields a score of 0 to 6. The overall score ranges from 0 to 60. Scores 0 to 6 indicate symptoms absent; 7 to 19 indicates mild depression; 30 to 34 defines moderate; 35 to 60 indicates severe depression. Changes in MADRS score was a primary measure.
- Modified Quick Inventory of Depressive Symptoms Self Report Scale (QIDS-SR) [ Time Frame: baseline & week 8 ] [ Designated as safety issue: Yes ]The 16 item Quick Inventory of Depressive Symptomatology (QIDS-SR16) (Rush et al. 2003) is designed to assess the severity of depressive symptoms, with higher scores representing more severe forms of depression. When complete, the QIDS are scored by summing responses to obtain a total score ranging from 0 to 27. Either appetite increase or decrease, but not both, are used to calculate the total score. Weight increase or decrease, but not both, are used to calculate the total score. Scores 0-5 indicate no severity of depression; 6-10 is mild; 11-15 is moderate; 16-20 is severe; 21-27 is very severe levels of depression. Participants were evaluated at baseline and at weeks 1, 2, 3, 4, 6 & 8.
- Hamilton Anxiety Rating Scale (HARS) [ Time Frame: baseline & week 8 ] [ Designated as safety issue: No ]Each item is scored on a scale of 0 (not present) to 4 (severe), with a total score range of 0-56, where <17 indicates mild severity, 18-24 mild to moderate severity and 25-30 moderate to severe. Scores > 30 indicate severe anxiety.
- Montgomery-Asberg Depression Rating Score (MADRS) [ Time Frame: baseline and week 8 ] [ Designated as safety issue: Yes ]Higher MADRS score indicates more severe depression, and each item yields a score of 0 to 6 on 10 items. The overall score ranges from 0 to 60. Scores 0 to 6 indicate symptoms absent; 7 to 19 indicates mild depression; 30 to 34 defines moderate; 35 to 60 indicates severe depression. Changes in response rate and remission rate were assessed for secondary measures.
|Study Start Date:||June 2006|
|Study Completion Date:||December 2011|
|Primary Completion Date:||December 2011 (Final data collection date for primary outcome measure)|
memantine (5-20mg a day)
memantine 5mg - 20mg PO daily
Other Name: Namenda
Placebo Comparator: Placebo
placebo (5-20mg a day)
5mg - 20mg PO daily over 8 weeks
The objective of this study is to evaluate the efficacy and safety of 20 mg of memantine administered once daily as an augmentation agent for subjects who have been taking antidepressants for at least 1 month but who have experienced an incomplete or absent therapeutic response.
Memantine is a moderate affinity, uncompetitive N-methyl-D-aspartate (NMDA) receptor antagonist that is approved for the treatment of moderate-to-severe dementia of the Alzheimer's type. It has been commercially available in 23 countries worldwide since 1982.
There are reports in the published literature that suggest NMDA receptors may be involved in the etiology of depressive disorders. The NMDA antagonist ketamine has been shown to have antidepressant effects in a placebo-controlled clinical trial (Berman et al., 2000). Uncompetitive NMDA receptor antagonists, including memantine, have been shown to exhibit antidepressant-like activity in animal models of depression (Moryl et al., 1993, Papp and Moryl 1994). Animal studies also support the possibility that uncompetitive NMDA receptor antagonists may work synergistically in combination with antidepressants in animal models of depression (Rogoz et al., 2001). Some authors have hypothesized a role for NMDA receptors in the therapeutic effects of numerous antidepressants (Skolnick et al., 1996).
- Study Design and Duration
This is a randomized, single site, double-blind, placebo-controlled, parallel-group study in outpatients. The study consists of an 8-week double-blind treatment period. Approximately 25 patients will be randomized to each treatment group (memantine or placebo) for a total of approximately 50 patients.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00344682
|United States, Massachusetts|
|Center for Psychopharmacologic Research and Treatment (University of Massachusetts Medical School)|
|Worcester, Massachusetts, United States, 01605|
|Principal Investigator:||Kristina M Deligiannidis, M.D.||University of Massachusetts, Worcester|