Carbon monoxide (CO) poisoning is a leading cause of death by suicide. Acute CO intoxication may induce hypoxic encephalopathy with variable presentations, ranging from confusion to deep coma but most recover completely from the acute episode following CO poisoning. However, up to 30% of survivors develop neuropsychiatric and cognitive manifestations 1 week to 6 months after CO exposure and the illness trajectories are less well documented. Here, we report 2 cases of CO poisoning with delayed neuropsychiatric sequelae and variable course of recovery.
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