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 .
Differential effects of trimipramine and fluoxetine on sleep in geriatric depression.
The effects of trimipramine , a tricyclic antidepressant ( TCA ) with atypical pharmacological properties , and fluoxetine , a selective serotonine reuptake inhibitor ( SSRI ) , were compared in an exploratory analysis using mood and polysomnographic parameters during a six-week double-blind trial in 19 depressed geriatric patients . In sleep EEG measures , trimipramine demonstrated clear-cut effects on sleep measures result ing in higher values for sleep efficiency , total sleep time , stage 2 sleep , and shorter wake time . Under fluoxetine treatment , the proportion of REM sleep was decreased and REM latency was lengthened , whereas no change in REM sleep parameters was observed in the trimipramine group . The present data suggest that early antidepressant effects of medication occur independently of drug-induced changes in objective measures of sleep , i.e. suppression of REM sleep
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 .