Superior antidepressant efficacy results of agomelatine versus fluoxetine in severe MDD patients: a randomized, double-blind study.
The objective of this international, 8-week, randomized, double-blind study was to show the superiority of the antidepressant efficacy of agomelatine, the first MT1/MT2 receptor agonist and 5-HT2C receptor antagonist antidepressant, versus fluoxetine in outpatients fulfilling Diagnostic and Statistical Manual of Mental Disorders-volume IV-TR criteria for major depressive disorder of severe intensity, defined by a baseline Hamilton Depression Rating Scale (HAM-D17) total score of at least 25 and CGI severity of illness score of at least 4. Patients received agomelatine 25-50 mg/day (n=252) or fluoxetine 20-40 mg/day (n=263) for 8 weeks. The main efficacy outcome measure was HAM-D17 total score (change from baseline to last post-baseline assessment). Secondary outcome measures were Clinical Global Impressions-improvement (CGI), severity (CGI-S), anxiety (HAM-A), and sleep (HAM-D sleep items) scores. The mean decrease in HAM-D17 total score over 8 weeks was significantly greater with agomelatine than fluoxetine with a between-group difference of 1.49 (95% confidence interval, 0.20-2.77; P=0.024). The percentage of responders at last post-baseline assessment was higher with agomelatine on both HAM-D17 (decrease in total score from baseline ≥50%; 71.7% agomelatine vs. 63.8% fluoxetine; P=0.060) and CGI-improvement (score 1 or 2; 77.7 vs. 68.8%; P=0.023). There was a significant between-group difference of 0.37 (95% confidence interval, 0.06-0.68) in HAM-D sleep subscore in favor of agomelatine (P=0.018). Similar improvements were observed on HAM-A with agomelatine and fluoxetine. Both treatments were safe and well tolerated. In conclusion, in this study, agomelatine showed superior antidepressant efficacy over fluoxetine in treating patients with a severe episode of major depressive disorder after 8 weeks of treatment with a good tolerability profile.
Hale
Anthony
A
Trust Headquarters, St Martin's Hospital, Canterbury, UK. ash25@kent.ac.uk
Corral
Ricardo-Marcelo
RM
Mencacci
Claudio
C
Ruiz
Jeronimo Saiz
JS
Severo
Cristina Albarran
CA
Gentil
Valentim
V
D000081:Acetamides / Q000009:adverse effects / Q000627:therapeutic use*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000928:Antidepressive Agents / Q000009:adverse effects / Q000627:therapeutic use*; D003865:Major Depressive Disorder / Q000188:drug therapy* / Q000503:physiopathology; D039721:Diagnostic and Statistical Manual of Mental Disorders; D004311:Double-Blind Method; D005260:Female; D005473:Fluoxetine / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D038622:Internationality; D008297:Male; D008875:Middle Aged; D010352:Patient Dropouts; D044122:Receptor, Melatonin, MT1 / Q000819:agonists*; D044123:Receptor, Melatonin, MT2 / Q000819:agonists*; D058830:Serotonin 5-HT2 Receptor Antagonists / Q000009:adverse effects / Q000627:therapeutic use*; D017367:Selective Serotonin Reuptake Inhibitors / Q000009:adverse effects / Q000627:therapeutic use; D012720:Severity of Illness Index; D055815:Young Adult; D009281:Naphthalenes
D000081:Acetamides; D000928:Antidepressive Agents; D005473:Fluoxetine; D044122:Receptor, Melatonin, MT1; D044123:Receptor, Melatonin, MT2; D058830:Serotonin 5-HT2 Receptor Antagonists; D017367:Selective Serotonin Reuptake Inhibitors; C084711:agomelatine; D009281:Naphthalenes