DUI is not just about driving while under the influence of alcohol. Under the new code section of Vehicle Code § 23152(e), DUI for drugs is its own code section, although the law against such driving has existed for dozens of years. Lately, however, such DUI’s appear more and more common. The key, we find it quantifying the level of the illegal drug in one’s system, or if it is a legal drug obtained while on prescription, measuring the concentration of the drug and comparing it to one’s prescription. For more information about this offense, click on the following link.