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How Alcohol Affects Your Body

The Law Offices of Tad Nelson & Associates

1212 Studewood St #107 • Houston, TX • 77008
PHONE: 713-802-1631

Blood Alcohol Concentration Table

The table below describes how the level of alcohol of in the human bloodstream may affect your motor functions and cognitive abilities. The higher level of your BAC (Blood Alcohol Concentration), the more your physical functions will be affect.

For more information about how alcohol affects human chemistry or to speak with a criminal defense lawyer about fighting DWI charges in Houston, contact The Law Offices of Tad Nelson & Associates at 713-802-1631.

BAC LevelPsychological StatePhysical State
0.01-0.05Subclinical

  • Influence/effects not apparent or obvious

  • Behavior nearly normal by ordinary observation

  • Impairment detectable by special tests

0.03-0.12Euphoria

  • Mild euphoria, sociability, talkativeness

  • Increased self-confidence; decreased inhibitions

  • Diminution of attention, judgment and control

  • Some sensory-motor impairment

  • Slowed information processing

  • Loss of efficiency in critical performance tests

0.09-0.25Excitement

  • Emotional instability; loss of critical judgment

  • Impairment of perception, memory and comprehension

  • Decreased sensatory response; increased reaction time

  • Reduced visual acuity, peripheral vision and glare recovery

  • Sensory-motor uncoordination; impaired balance

  • Drowsiness

0.18-0.30Confusion

  • Disorientation, mental confusion; dizziness

  • Exaggerated emotional states (fear, rage, grief, etc.)

  • Disturbances of vision (diplopia, etc.) and of perception of color, form, motion, dimensions

  • Increased pain threshold

  • Increased muscular uncoordination; staggering gait; slurred speech

  • Apathy, lethargy

0.25-0.40Stupor

  • General inertia; approaching loss of motor functions

  • Markedly decreased response to stimuli

  • Marked muscular uncoordination; inability to stand or walk; vomiting; incontinence of urine and feces

  • Impaired consciousness; sleep or stupor

0.35-0.50Coma

  • Complete unconsciousness; coma; anesthesia

  • Depressed or abolished reflexes

  • Subnormal temperature

  • Impairment of circulation and respiration

  • Possible death

0.45 +Death

  • Death from respiratory arrest

© by Kurt M. Dubowski, University of Oklahoma College and Medicine, Oklahoma City, OK, 1997

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