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 .
A comparison of fluoxetine, imipramine, and placebo in patients with major depressive disorder.
The efficacy and safety of fluoxetine were compared with those of imipramine and of placebo in a 6-week r and omized double-blind parallel study of patients with major depressive illness .  Mean values for all efficacy measurements were improved over baseline with fluoxetine and imipramine treatment ( p less than .001 ) . More fluoxetine patients completed the study than did  imipramine or placebo patients . Predominant adverse experiences reported by imipramine patients were dry mouth and dizziness/lightheadedness . Predominant adverse experiences reported by fluoxetine patients were drowsiness/sedation and excessive sweating . In a subsequent 48-week open-label study , the predominant adverse experience in the fluoxetine group was excessive sweating and in the imipramine group was still dry mouth . In this study , fluoxetine relieved the symptoms of major depressive illness effectively and significantly better than placebo and was better tolerated than imipramine
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 .