In every state it’s illegal to drive while under the influence of drugs, alcohol, or any combination of these. However, the laws and penalties vary by state. And while the universal term for the crime is “DUI” (driving under the influence), many states also use other terms such as “DWI” (driving while intoxicated or impaired), “OUI” (operating under the influence), “OWI” (operating while intoxicated), and “DWAI” (driving while ability impaired). See below for important information about DUI law, including the law in your state.