Blood Concentrations and Clinical Findings Following Overdose of Chlordiazepoxide Alone and Chlordiazepoxide Plus Ethanol

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Abstract
Blood concentrations and clinical findings in 25 cases of overdose involving chlordiazepoxide (CDZ) alone (pure) were compared with those in 23 cases of overdose involving ethanol in addition to CDZ (mixed). Both groups consisted predominantly of men who were chronic alcoholics. The mean blood CDZ concentrations did not show statistically significant difference between the 2 groups (pure, 5 mg/l; mixed, 6 mg/l). Following pure ingestion, patients were usually alert, and the level of consciousness showed no statistically significant correlation with the blood CDZ concentration. In contrast, after mixed ingestion patients were usually lethargic, and the level of consciousness correlated significantly with the blood CDZ concentration (P < 0.05) but not with the blood ethanol concentration. In neither group was coma noted. For both groups the most common physical findings were tachycardia and dysarthria. Nystagmus was much more common following mixed ingestion while seizures, hyperreflexia, and hypertension were more frequent after CDZ overdose alone. Most patients were seen only in the emergency room and were discharged. The implications of these findings are discussed.

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