BACtrack S30 User Manual

dOse-speCIfIC effeCTs Of alCOhOl

*

0.02-0.03%

slight euphoria. loss of shyness. 

Depressant effects are not apparent. 

Impairment possible in some individuals.

0.04-0.06%

Feeling of well-being, relaxation, lower 

inhibitions and sensation of warmth. 

euphoria. some minor impairment of 

reasoning and memory. Lowering of 

0.07-0.09%

slight impairment of balance, speech, 

vision, reaction time, and hearing. 

euphoria. Judgment and self-control are 

reduced. Caution, reason and memory 

are impaired. Driving skills are always 

0.10-0.12%

significant impairment of motor 

coordination and loss of good judgment. 

speech may be slurred. Balance, vision, 

reaction time and hearing will be 

impaired. euphoria.

0.13-

0.15%

Gross motor impairment and lack 

of physical control. Blurred vision 

and major loss of balance. euphoria 

is reduced and dysphoria (anxiety, 

restlessness) is beginning to appear.

0.16-

0.20%

Dysphoria predominates. nausea  

may appear.

0.25%

needs assistance in walking. Total 

mental confusion. Dysphoria with 

nausea and some vomiting.

0.30%

loss of consciousness.

0.40% 

and up

Onset of coma. Possible death due  

to respiratory arrest**.

1

 Bailey, william J., Drug use in american society, 3rd ed.,  

Minneapolis: Burgess, 1993

*  The effects of alcohol intoxication are greatly influenced by 

individual variations among users. some users will be intoxicated  

at a much lower BaC than shown above.

**Death can occur at a lower BaC in some individuals.
The generally accepted legal standard for alcohol intoxication in the 

united states is 0.08%. However, your driving skills can be impaired 

at a level of 0.04% or lower. It is never safe to drink any amount of 

alcohol and drive.