Fatal self-administration of sodium azide.

A 19-year old woman ingested an unknown amount of sodium azide (NaN3). The earliest symptoms were nausea and loss of vision. Within a few hours her clinical features were dominated by central nervous system signs, acute pulmonary edema, lactic acidosis, and hypothermia. The patient died within 12 hours, hypotension and shock occurring as preterminal events. This was the first recorded case in which antidotal methemoglobin production was attempted. Sodium nitrite administration resulted in methemoglobinemia but did not appreciably alter the clinical course and may not be of major benefit. Gross examination post-mortem showed marked pulmonary edema, visceral hemorrhage and congestion, and slight cerebral edema. Microscopically, the lungs showed alveolar and interstitial edema and a polymorphonuclear infiltrate. There were petechial hemorrhages and severe nonspecific changes in the brain.