Most people have talked or walked during sleep at some time in our lives. However, some people exhibit more unusual complex behaviors while asleep, including eating and driving.

These types of behaviors, called parasomnias, come about when parts of our brain are asleep and other parts awake at the same time. Parasomnias, while generally considered normal in a healthy child, can be a cause for concern when they develop in adults.

Earlier this year the FDA issued a “black box” warning for the sleep medications eszopiclone, zaleplon, and zolpidem, given reports of sleep behaviors that resulted in injuries from falls, car accidents, and accidental overdoses related to their use.

The FDA also notes that all medications used to promote sleep reduce alertness and may cause drowsiness the following day, which may impair your ability to drive.