Antidepressant effect of femoxetine and desipramine and relationship to the concentration of amine metabolites in cerebrospinal fluid

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Abstract
The antidepressant and biochemical effects of femoxetine, a selective serotonin uptake inhibitor, and desipramine, a selective nor‐adrenaline uptake inhibitor, have been compared in a double–blind study in 42 outpatients with depressive illness. The patients were allocated at random to treatment with either 600 mg femoxetine or 150 mg desipramine daily for 6 weeks. The total depression score showed a significant decrease in both groups, indicating an overall improvement in depressive symptoms. The patients treated with femoxetine reported significantly less severe anticholinergic effects during the whole treatment period than the desipramine patients. Both drugs decreased the level of 5‐HIAA in CSF, whereas no consistent changes were found in the HMPG and HVA levels. The pretreatment level of the metabolites had no predictive value for the outcome of the treatment with either drug. No significant correlation was found between therapeutic effect and the plasma concentration of the active compounds.