Drowsy driving is the dangerous combination of driving when sleepy. This usually happens when a driver has
not slept enough, but it can also happen because of untreated sleep disorders or shift work. Prescription
and over-the-counter medications can also cause drowsiness, and alcohol can interact with sleepiness to
increase both impairment and drowsiness.
Photo of hands on a steering wheel of a car, driving at night.
No one knows the exact moment when sleep will come over their body. Falling asleep at the wheel is clearly
dangerous, but being sleepy also affects your ability to drive safely, even if you don’t fall asleep.
Drowsiness: