Alcohol is a depressant that can impair your ability to drive. How much alcohol it takes to impair your ability to drive varies from person to person. Most experts agree that it takes at least 0.05% blood alcohol concentration (BAC) to impair your ability to drive.

If you have one drink, your BAC may be around 0.02%. This may not be enough to impair your ability to drive. However, if you have more than one drink, your BAC will likely …