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Effectiveness of mirtazapine in the treatment of depression with associated somatic symptoms.

INTRODUCTION
A assess the efficacy of mirtazapine in the treatment of depression with somatic symptoms in a 3-months follow-up study.


MATERIAL AND METHODS



DESIGN
multicenter, prospective, observational, open-label, and non controlled study.


SAMPLE
seven hundred and eleven patients recruited in outpatient psychiatric consultations by 98 psychiatrists nationwide.


INSTRUMENTS
17-Item Hamilton Depression Rating Scale (HAMD-17) and Standardized Polyvalent Psychiatric Interview (SPPI), somatic symptoms section. Patients were assessed pretreatment and at 15, 30 and 90 days post-treatment.


RESULTS
Severity of depression assessed by HAMD-17 significantly decreased (p<0.0001) from 23.27 in the pretreatment assessment to 6.75 at 3 months post-treatment. Severity of somatic symptoms assessed by EPEP significantly decreased (p<0.0001) from 7.68 in the pre-treatment assessment to 2.28 at 3 months post-treatment. Mirtazapine modifies attribution of somatic symptoms in somatizers: in pretreatment assessment, 41.3 % of the sample attributed somatic symptoms to a psychological origin, while at 3 months post-treatment this percentage significantly increased (p<0.05) to 63.94%. Nearly half of the sample (48.52%) took benzodiazepines at the start of the study; but at 3 months post-treatment only 6.71% of the patients needed them. The incidence of adverse effects was 13.36% of the patients. From the total dropouts 4% were due to adverse events.


CONCLUSIONS
Mirtazapine is an effective and safe antidepressant for the treatment of depression with somatic symptoms and is able to modify attribution of somatic symptoms in somatizing patients.