Licensed for 41 years. It is usually measured as mass per volume. One commonly asked question relates to how long customers have to wait after drinking before they can successfully take an interlock test. So the answer to the question, How long after you stop drinking can you pass an ignition interlock device test? However, if you have prior offenses, or your BAC was high, the interlock period may be longer. CGAA will not be liable for any losses and/or damages incurred with the use of the information provided. This is a question that many people ask, especially those who are concerned about drinking and driving. You know when you feel tipsy, or even when you pass out. However, according to alcohol research at Stanford University, factors also include: The longer it takes to metabolize the alcohol, the longer it stays in your system. The device will, however, record the test failure. is anywhere from 12 to 24 hours after your last drink. The cookie is used to store the user consent for the cookies in the category "Performance". Failure to do so can result in permanent lockouts that require towing. So, can you drink the night before interlock tests? The device will indicate when to start and stop but this usually lasts for about 5 seconds. Depending on your state's laws, this could be anywhere from 24 hours to 30 days. There are truly no shortcuts sleep, coffee, water, energy drinks, or any solutions found on the internet that will ensure a successful breath test.