International clinical psychopharmacology
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Int Clin Psychopharmacol · Mar 2009
Randomized Controlled Trial Multicenter Study Comparative StudyPlacebo-controlled inpatient comparison of venlafaxine and fluoxetine for the treatment of major depression with melancholic features.
The objective of this study was to compare venlafaxine and fluoxetine with placebo in treating major depressive disorder with melancholic features. Adult inpatients with Diagnostic and Statistical Manual of Mental Disorders, fourth edition major depressive disorder with melancholia and 21-item Hamilton Depression Rating Scale (HAM-D₂₁) scores > or =24 (n=289) were randomized to receive (double-blind) venlafaxine 225-375 mg/day, fluoxetine 60-80 mg/day, or placebo for 6 weeks. The primary outcome measures were HAM-D₂₁ total score, HAM-D depressed mood item, Montgomery Asberg Depression Rating Scale total score and the Clinical Global Impressions-Severity (CGI-S) and Improvement (CGI-I) scores. ⋯ Increases in pulse and blood pressure, dry mouth, constipation, and lightheadedness were significantly more common with venlafaxine than fluoxetine. Venlafaxine was statistically superior to placebo on two of five primary and two of five secondary outcome measures and to fluoxetine on one primary and one secondary outcome measure (LOCF). Venlafaxine was not superior to fluoxetine or placebo in providing remission.
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Int Clin Psychopharmacol · Mar 2009
Randomized Controlled Trial Multicenter Study Comparative StudyEfficacy of pregabalin and venlafaxine-XR in generalized anxiety disorder: results of a double-blind, placebo-controlled 8-week trial.
The objective of this study was to evaluate the anxiolytic efficacy, and speed of onset of efficacy, of pregabalin (PGB) and venlafaxine-XR (VXR) in patients with generalized anxiety disorder (GAD). In this double-blind trial, outpatients, ages 18-65 years, who met Diagnostic and Statistical Manual of Mental Disorders, 4th edition, criteria for GAD were randomized to 8 weeks of flexible-dose treatment with PGB (300-600 mg/day), VXR (75-225 mg/day), or placebo (PBO). The intent-to-treat sample consisted of 121 patients on PGB [least square (LS) mean ± SE baseline Hamilton Anxiety Rating Scale (HAM-A), 27.6 ± 0.4], 125 patients on VXR (baseline HAM-A, 27.4 ± 0.4), and 128 patients on PBO (baseline HAM-A, 26.8 ± 0.4). ⋯ Treatment with PGB showed an early onset of improvement, with significantly greater LS mean change in the HAM-A by day 4 versus both PBO (-5.3 ± 0.5 vs. -3.4± 0.5; P = 0.008) and VXR (-2.9 ± 0.5; P = 0.0012). The proportion of patients reporting a severe adverse event was similar for PGB (9.1%) and PBO (7.8%), but higher for VXR (20.0%; P < 0.05). In conclusion, PGB was a safe and effective treatment of GAD, with a significantly earlier onset of anxiolytic activity than VXR.
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Int Clin Psychopharmacol · Sep 2008
Randomized Controlled Trial Multicenter StudyEfficacy, safety, and tolerability of fixed-dose desvenlafaxine 50 and 100 mg/day for major depressive disorder in a placebo-controlled trial.
The objective of this study was to assess the efficacy, safety, and tolerability of desvenlafaxine (administered as desvenlafaxine succinate) 50 and 100 mg/day for major depressive disorder (MDD). A multicenter, randomized, double-blind, placebo-controlled trial was conducted in Europe and South Africa. Outpatients with MDD received fixed-dose desvenlafaxine (50 or 100 mg/day) or placebo for 8 weeks. ⋯ Both doses of desvenlafaxine were generally well tolerated. The most common treatment-emergent adverse events were nausea, dizziness, insomnia, constipation, fatigue, anxiety, and decreased appetite. Fixed doses of desvenlafaxine 50 and 100 mg/day are safe, generally well tolerated, and effective at a clinically relevant level for the treatment of MDD.
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Int Clin Psychopharmacol · May 2008
Randomized Controlled Trial Multicenter Study Comparative StudyVenlafaxine extended release versus citalopram in patients with depression unresponsive to a selective serotonin reuptake inhibitor.
Findings from the National Institute of Mental Health's Sequenced Treatment Alternatives to Relieve Depression trial indicate that approximately 50% of patients with major depressive disorder do not experience a treatment response after adequate first-line treatment with a selective serotonin reuptake inhibitor (SSRI). This study was designed to test the hypothesis that, after treatment failure with an SSRI, switching to venlafaxine extended release (ER) would offer advantages over switching to another SSRI, citalopram. The objectives of this trial were to compare the efficacy and safety of venlafaxine ER and citalopram in the treatment of moderate-to-severe depression in patients who did not experience a treatment response to an SSRI other than citalopram and to investigate the effects of severity of depression by categorizing treatment groups according to baseline severity. ⋯ Overall, venlafaxine ER and citalopram showed similar efficacy in patients who had an inadequate response to an SSRI. In the subset of more severely depressed patients, venlafaxine ER was significantly more effective on a number of efficacy measures. Patients who remain severely depressed following treatment with an SSRI may gain more benefit from the dual-action drug venlafaxine, rather than switching to another SSRI.
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Int Clin Psychopharmacol · Jan 2008
Randomized Controlled Trial Multicenter StudyLong-term efficacy of pregabalin in generalized anxiety disorder.
A multicenter, randomized, placebo-controlled, double-blind study was conducted to evaluate the efficacy of pregabalin in preventing relapse of generalized anxiety disorder (GAD) after response to short-term treatment. Outpatients (n=624) with GAD for > or =1 year received open-label pregabalin (450 mg/day) for 8 weeks and, if a clinical response was observed, were randomized to receive either pregabalin (450 mg/day; n=168) or placebo (n=170) for 24 weeks. The primary efficacy parameter was time to relapse. ⋯ AEs were relatively low in the double-blind phase; only three AEs occurred with an incidence of more than 5% on pregabalin and placebo, respectively: infection (14.9 vs. 11.2%), headache (10.1 vs. 11.2%), and somnolence (6.0 vs. 0%). No safety concerns were identified with long-term treatment. The study indicates that pregabalin is an effective treatment for the prevention of relapse in patients with GAD.