Yes, in most states the breathalyzer is seen as a presumptive test.

no drugs can be detected on a breathilizer.

a breathalyzer is used to tell if someone is drunk.

The best information that i could attain was on winikapedia. It gives a run down on everything that there is to know about a breathalyzer and how it works. The link to it is here if your interested http://en.wikipedia.org/wiki/Breathalyzer.

Don't drink is the only way to "beat" a breathalyzer. Or, get sober long before you drive, over many hours. The breathalyzer test is very sensitive. You cannot fool it. It will not help to chew gum or suck on mints.

There is one OTHER way to avoid a breathalyzer... have a designated sober driver.

The Breathalyzer is a device which can be used to test the alcohol content level in blood. If you want to know more information on this. You can check here http://www.rapiddrugdetection.com/Alcohol-Breathalyzer-p-1-c-250.html