You commonly hear the radio ad and television commercials sponsored by NHTSA and their catchy phrase "buzz driving is drunk driving". This is false news. These ads live off of fear generated to the public. The truth is government must prove intoxication either by loss of your normal physical or mental faculties by introduction of drugs or alcohol or having an alcohol concentration of blood or breath at or above .08 BAC. Yes you can get a dwi charge without alcohol in your system. I'm seeing with the decriminalization of Marijuana more and more non-alcohol related Driving While Intoxicated charges. The state of Texas does have methods of testing for amount of marijuana and other drugs in your system to be charged for DWI. Let an experienced attorney help walk you through the process.