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The Prognostic Impact of Psychotropic Drugs in Intentional Drug Overdose
Pharmacopsychiatry, 03/25/09

Tournier M et al. - Some drugs may be dangerous because of low toxic doses; hence, prescriptions of short duration may be recommended. Moreover, for safety reasons, prescribers may prefer SSRIs to tricyclics and benzodiazepines to carbamates or phenothiazines.

Methods

In order to assess which types of psychotropic drugs ingested during IDOs were associated with an increased morbidity, a cohort study included 1 974 patients consecutively hospitalised for IDO.
IDOs were categorised as serious if associated with one of the following criteria: death, hospitalisation longer than 48 h, respiratory support, vasopressive drugs, cardiac massage or dialysis.

Results

Nearly all the patients ingested psychotropic medications during the IDO (88.4%), most often benzodiazepines (71.6%).
Serious IDO was associated with tricyclics (OR 5.7; 95% CI 3.3-9.8), lithium (OR 4.3; 95% CI 1.6-11.6), carbamates (OR 2.7; 95% CI 1.8-4), anticonvulsants (OR 2.4: 95% CI 1.4-4.3), first-generation antipsychotics (OR 2.4; 95% CI 1.7-3.5) or selective serotonin reuptake inhibitors (SSRIs) (OR 1.6; 95% CI 1.1-2.3).

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