A drug DUI and alcohol DUI are treated very much the same when it pertains to penalties. However, the burden of proof required to prove that a person is under the influence of drugs while driving is different than it is for alcohol. While officers will likely perform a standard field sobriety test for both, if a breathalyzer finds the driver to have zero alcohol in their system after a failed field sobriety test, officers will usually perform a blood test to try and determine what substance the driver is using. Blood tests aren’t able to detect all drug types, and, if a person’s drug was undetectable, it gives officers less evidence to use against the driver in court. Visit drugcrime-law.com for more information about drug DUI offenses.