do u mean .45?or .045?.45 would be heading towards alcohol poisoning and .045 would mean halfway intoxicated..... .08 is legal intox in ohio....think this may be nationwide now!
If you know someone with a BAL of .45 and he/she is up walking around, then he/she is definitely an alcoholic but probably on the verge of death. Most people would be passed out cold, but an alcoholic can function (not well but much better than a social drinker) with a much higher BAL -- .2 to .3 is common.
Like ibizan said, .045 is about one drink, depending on the size of the person. To be considered too impaired to drive in Florida the limit is .08. Above .08 a person is considered too impaired TO DRIVE, but many people might not be intoxicated at all.
I think at 4.5% that should do more than intoxicate a person. I think the above people must be right that it's a typo.
http://en.wikipedia.org/wiki/Blood_alcohol_content
Here you go. That should help a little. As you can see 4.5 is off the chart.. Someone must have unbelievable, unhuman-like tolerance to survive 1% much less 4.5% They are in fact human right?
Okay...bedtime for me... I'm getting a little goofy/slap happy...