The DUI law in Oklahoma has been expanded to include any intoxicating substance that could hamper your ability to operate a motor vehicle safely, including metabolites, and valid prescriptions.
The penalty at court and DPS are the same as DUI with little variation.
DUI attorney Alan R Woodland has been trained to operated the chromatograph that Oklahoma labs use to analyze your blood. Many officer's don't correctly observe clues of drug intoxication and make bad arrests.
Alan has been trained the same way law enforcement officer's have, including their ARIDE (Advanced Impaired Driving) course which focuses on drug impairment observation. Most troopers have ARIDE certification.