Because of their low incidence of adverse effects SSRI are prescribed
more and more frequently in patients with depressive disorders. SSRI i
nhibit different subsystems of cytochrome-P 450-oxydase. Especially du
ring co-administration of SSRI with antipsychotic and antiarrhythmic d
rugs pharmaco-kinetic interactions have to be observed carefully. In t
his presentation a case of bradycardia after co-administration of paro
xetine and metoprolol is reported, Drug history and a careful drug mon
itoring are necessary requirements to avoid serious adverse effects.