Det virker ved at forhindre, at neurotransmitterne 5- hydroxytryptamin (også kaldet serotonin) og noradrenalin genoptages i nervecellerne i hjernen og rygmarven.
It works by preventing the neurotransmitters 5-hydroxytryptamine (also called serotonin) and noradrenaline from being taken back up into nerve cells in the brain and spinal cord.