g / 100 ml blood

g / 210 l  breath
Stage Clinical Symptoms
0.01 - 0.05 Subclinical Behavior nearly normal by ordinary observation
0.03 - 0.12 Euphoria Mild euphoria, sociability, talkativeness
Increased self-confidence; decreased inhibitions
Diminution of attention, judgment and control
Beginning of sensory-motor impairment
Loss of efficiency in finer performance tests
0.09 - 0.25 Excietment 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
Decreased sensory-motor coordination; impaired balance
0.18 - 0.30 Confusion Disorientation, mental confusion; dizziness
Exaggerated emotional states
Disturbances of vision and of perception of color, form,
motion and dimensions
Increased pain threshold
Decreased muscular coordination; staggering gait;
slurred speech
Apathy, lethargy
0.25 - 0.40 Stupor General inertia; approaching loss of motor functions
Markedly decreased response to stimuli
Marked decrease in muscular coordination;
inability to stand or walk
Vomiting; incontinence
Impaired consciousness; sleep or stupor
0.35 - 0.50 Coma Complete unconsciousness
Depressed or abolished reflexes
Subnormal body temperature
Impairment of circulation and respiration
Possible death
0.45 + Death Death from respiratory arrest