Newer antidepressants like the selective serotonin-reuptake-inhibitors
(SSRI) and the reversible inhibitors of amine oxidase-A moclobemide (
RIMA) are prescribed as well from internists and general practitioners
because of their lack of anticholinergic side effects. In this connec
tion it must be paid attention especially to the interactions with int
ernal co-medication. The presented case report describes the significa
nce of drug-monitoring with a depressive comorbid patient resistant to
treatment who developed during a combined therapy of moclobemide with
trimipramine, neuroleptics co-medicated with omeprazol an agitated st
atus with neurological and cardiovascular symptoms which we consider t
o be a beginning serotonin syndrome. Beside the necessary drug-monitor
ing it is advisable to classify the pharmacogenetic status of risk pat
ients.