Plasma catecholamine metabolites in antidepressant-exacerbated mania and psychosis

We measured plasma free HVA and MHPG in 39 cases of psychosis or mania judged to be caused by antidepressant exacerbation of symptoms. A total of 24 of patients had been receiving selective serotonin reuptake inhibitors (SSRI's). The SSRI group showed a pattern of increased plasma HVA similar to a comparison group of patients with a psychotic/manic relapse secondary to medication non-compliance.