Remission rates with venlafaxine extended release in Greek outpatients with generalized anxiety disorder. A double-blind, randomized, placebo controlled study.
The primary endpoints in this study were the remission rates [final Hamilton Rating Scale for Anxiety (HAM-A) total score < or =7] and reduction from baseline in the HAM-A total score in patients with generalized anxiety disorder (GAD) and no associated depression. Patients with GAD (DSM-IV and HAM-A total score >18) were randomly assigned to treatment with venlafaxine XR or placebo for 8 weeks. A 1-week placebo run-in period preceded the double-blind phase. Patients with a >20% drop in their total HAM-A score during the run-in period, were excluded from the double-blind phase. All patients started therapy with 75 mg/day venlafaxine XR or matched placebo. Patients with less than 30% decrease in their HAM-A total score at the end of the second week, doubled their dose. Patients on the 150 mg/day dose underwent a 1-week taper period. Of the 24 patients in the venlafaxine XR group, 62.5% achieved remission versus 9.1% in the placebo group (P=0.0006). The mean decrease from baseline in HAM-A total score was 19.2 points for the venlafaxine XR group and 10.8 points for the placebo group (P<0.001). Eleven placebo-treated patients and seven venlafaxine XR treated patients doubled their dose at the end of the second week of double-blind treatment. No patient interrupted therapy because of side-effects. No changes in systolic or diastolic blood pressure were observed. Venlafaxine XR 75-150 mg/day was well tolerated. The remission rates achieved with venlafaxine 75-150 mg/day in non-depressed GAD patients were high with good tolerability.
Nimatoudis
I
I
Third Department of Psychiatry, AHEPA Hospital, Medical School, University of Thessaloniki, Thessaloniki, Greece.
Zissis
N P
NP
Kogeorgos
J
J
Theodoropoulou
S
S
Vidalis
A
A
Kaprinis
G
G
D000328:Adult; D014151:Anti-Anxiety Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D001008:Anxiety Disorders / Q000188:drug therapy*; D003511:Cyclohexanols / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D003692:Delayed-Action Preparations; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005260:Female; D006115:Greece; D006801:Humans; D008297:Male; D010045:Outpatients; D011569:Psychiatric Status Rating Scales; D012008:Recurrence; D012074:Remission Induction; D013997:Time Factors; D016896:Treatment Outcome; D000069470:Venlafaxine Hydrochloride
D014151:Anti-Anxiety Agents; D003511:Cyclohexanols; D003692:Delayed-Action Preparations; D000069470:Venlafaxine Hydrochloride