Blood alcohol level (BAL), blood alcohol concentration (BAC) and blood alcohol content (BAC) are terms that refer to the amount of alcohol present in the blood at a given time.  It is expressed as a ratio of grams alcohol per 100 milliliters (deciliter) of blood and is used as a measure of intoxication.
The physical and mental signs listed here are generalizations.  Alcohol affects everyone differently.  A person who rarely drinks may show impairment of reflexes with a .04 alcohol level.
Typical physical and mental signs of intoxication:
BAC .01-.06 g/dL
  • Feeling relaxed
  • A sense of Well-Being
  • Thought, judgment and coordination may be Impaired
  • Alcohol may influence driving ability
BAC .06-.10 g/dL
  • Loss of Inhibitions
  • Extroversion
  • Reasoning is affected
  • Reflexes, depth perception, and peripheral vision are impaired
  • Impaired driving ability
BAC .11-.20 g/dL
  • Emotional swings
  • Sadness or depression
  • Anger or belligerence
  • Reaction time is impaired
  • Speech is slurred
BAC .21-.29 g/dL
  • Stupor
  • Blackouts
  • Motor Skills are severely impaired
BAC .30-.39 g/dL
  • Severe depression
  • Loss of consciousness
  • Breathing and heart rate impaired
BAC .40 g/dL or greater
  • Breathing and heart rate impaired
  • Death
Any level of alcohol use can affect driving ability. Learn about how long alcohol stays in the body in our article:   "An Atlanta Drunk Driving Injury Lawyer Explains How Next Day DUI Accidents Occur".  
Atlanta DUI Injury Lawyer Shane Smith has written a book "I Was Hit By A Drunk Driver.  What Do I Do Next?" to advise victims of DUI of their rights.  Get your free copy.
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