When people think about impaired driving, they think about driving under the influence of alcohol or illicit drugs. But impairment also can be caused by medications, including prescription and over-the-counter drugs. Some can cause dizziness and fatigue.
In fact, more than half of drivers admitted to U.S. trauma centers following crashes tested positive for drugs other than alcohol, according to the U.S. National Library of Medicine, and 1 in 4 tested positive for marijuana use. Drugs can slow reaction time, cloud judgment, decrease hand-eye coordination and cause you to fall asleep at the wheel.