Conclusions : International differences in prescriber behaviour may influence , and in turn be influenced by , the conduct of clinical trials .
Objective : International differences are thought to exist in dosages used by clinicians treating mood disorders .
This study examined international dosage differences in antidepressant clinical trials , using a data base formed and maintained as a component of a Cochrane review of comparative clinical trials of fluoxetine .
Fluoxetine versus amitriptyline in the treatment of major depression with associated anxiety (anxious depression): a double-blind comparison.
Although common in clinical setting s , major depressive disorder with associated anxious symptoms ( ' anxious depression ' ) has not been well studied in antidepressant clinical trials . The aim of this study was to compare the effects of fluoxetine versus amitriptyline in this group of patients . After a single-blind placebo run-in period of 2 weeks , patients were treated on a double-blind basis with fluoxetine or amitriptyline for 8 weeks . Assessment instruments included : 21-item Hamilton Rating Scale for Depression , Hamilton Rating Scale for Anxiety , Clinical Global Impressions , Raskin Depression Scale and Covi Anxiety Scale . A total of 157 patients were r and omized to either fluoxetine or amitriptyline . Fluoxetine was given at a fixed dose of 20 mg/day and amitriptyline was given in a range of 50 - 250 mg/day ( mean of 138.1 mg/day ) . Fluoxetine was comparable to amitriptyline in all efficacy measures except the HAMD sleep factor . Unwanted effects were more frequent and more severe in the amitriptyline-treated patients . Fluoxetine was comparably efficacious to amitriptyline in the treatment of major depression with associated anxiety .  Since fluoxetine was far better tolerated , it is a promising alternative for this frequent and disabling condition
Conclusions : International differences in prescriber behaviour may influence , and in turn be influenced by , the conduct of clinical trials .
Objective : International differences are thought to exist in dosages used by clinicians treating mood disorders .
This study examined international dosage differences in antidepressant clinical trials , using a data base formed and maintained as a component of a Cochrane review of comparative clinical trials of fluoxetine .