| Blood Alcohol Concentration (% w/v) | Stage of Alcohol Influence | Clinical Signs/Symptoms |
| 0.09-0.25 | Excitement | Beginning sensory-motor impairment Slow information processing
Loss of efficiency in finer performance tests Emotional instability; loss of critical judgment Impairment of perception, memory, and comprehension Decreased sensory response; increased reaction time Reduced visual acuity, peripheral vision and glare recovery Sensory-motor incoordination; impaired balance Drowsiness |
| 0.18-0.30 | Confusion | Disorientation, mental confusion; dizziness
Exaggerated emotional states (fear, rage, etc.) Disturbances of vision (diplopia, etc.) Increased pain threshold Increased muscular incoordination; staggering gait, slurred speech Apathy, lethargy |
| 0.25-0.40 | Stupor | General inertia; approaching loss of motor
functions Markedly decreased response to stimuli Marked muscular incoordination; inability to stand or walk Vomiting; incontinence of urine or feces Impaired consciousness; sleep or stupor |
| 0.35-0.50 | Coma | Complete unconsciousness; coma; anesthesia
Depressed or abolished reflexes Subnormal temperature Incontinence of urine or feces Impairment of circulation and respiration Possible death |
| 0.45+ | Death | Death from respiratory arrest |