You may have heard recently that Tiger Woods pled guilty to reckless driving and entered into a diversion program for his arrest on May 29, in which he was found passed out in his car with prescription drugs and marijuana in his system. While he had consumed no alcohol, it is illegal to drive under the influence of any drug, even validly obtained prescription medication. He was originally charged with driving under the influence (DUI).
If you are under 18, you are considered a juvenile. Unless you are not.
You know it is against the law to drive drunk so when you go out partying, you usually designate one of your friends to be the driver. You probably also have an uber or lyft app on your phone, just in case things get crazy.