Mild alteration of feelings, slight intensification of moods.
0.05
Feelings of relaxation, giddiness, lowered inhibitions. Judgment and motor skills are both slightly impaired.
0.08
Muscle coordination and reaction time impaired. Face, hands, arms, and legs may tingle and then feel numb. Legally intoxicated in Canada and some U.S. states.
0.10
Clumsiness, uncoordinated behavior. Impairment of mental abilities, judgment, and memory. Legally intoxicated in most U.S. states.
0.15
Irresponsible behavior, euphoria. Some difficulty standing, walking, and talking.
0.20
Motor and emotional control centers measurably affected. Slurred speech, staggering, loss of balance, and double vision can all be present.
0.40
Drinker is usually unconscious.
0.45
Respiration slows and can stop altogether.
0.50
Death can result.
Source: National Safety Council and California Department of Alcohol and Drug Programs