In the State of Indiana, the phrase DUI is shorthand for the crime of operating a vehicle while intoxicated. The statute in question isn’t concerned with drinking so much as it is with being in a state of intoxication while driving.
There are many ways to become intoxicated, but under Indiana law, it means you’ve consumed a substance so that there is an impaired condition of thought and action and the loss of normal control of your faculties.
Click here to learn more about DUIs that don’t involve alcohol.