Alcohol is most commonly associated with DUI, but it is not the only substance that can impair your ability to operate a vehicle safely. Other substances, including prescription drugs, recreational drugs, and even some over-the-counter medications can affect your coordination, depth perception, and reaction time, which impairs your ability to drive. If you have been arrested for DUI, you will need a criminal defense attorney experienced in DUI defense fighting for you. Contact Lawrence Law Firm at 318-232-4000 for a free consultation.