In a living person, blood alcohol concentration (BAC) is correlated with clinical features. A subject with a BAC of 300 mg/dL (0.30%) would MOST likely exhibit which clinical picture?
- A Mild euphoria and social disinhibition with intact coordination
- B Stupor, markedly impaired consciousness, and hypothermia ✓
- C Obvious intoxication with ataxia and dysarthria
- D Deep coma, respiratory depression, and death risk
Correct answer: B. Stupor, markedly impaired consciousness, and hypothermia
Explanation
BAC of 300 mg/dL corresponds to stupor — the individual has marked CNS depression, is difficult to rouse, shows profound incoordination, vomiting, hypothermia, and incontinence. Mild euphoria/disinhibition occurs at 50–100 mg/dL. Obvious intoxication with ataxia and dysarthria corresponds to 150–200 mg/dL. Deep coma with respiratory depression and risk of death typically occurs above 400–450 mg/dL. The legally prescribed limit for driving in India is 30 mg/100 mL (0.03%) under the Motor Vehicles Act.
Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.
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