ROCK HILL, S.C. -- A Rock Hill mother is now facing charges for getting behind the wheel with her two children after taking medication earlier in the day.

As hungry taco lovers came and went, employees at a Rock Hill Taco Bell say 29-year-old Lauren Conway was falling asleep inside the restaurant.

The store manager said Conway looked impaired. So he began to worry when she and her children began making their way to the parking lot.

According to the police report, the mother walked out of the Taco Bell with her two kids. She packed her family into an SUV and drove off, although employees said it didn't look like she was fit to drive.

Employees called the police and she was arrested for DUI.

But she wasn't drunk, she blew a 0.00 BAC on the breathalyzer. Police said she had taken about 40 mg of Prozac that day.

New studies show a higher number of drugged driving in recent years. A report by Governor's Highway Safety Association and the Foundation for Advancing Alcohol Responsibility found drugs of all types -- illegal and prescription -- were present in 43 percent of fatal crashes in 2015. In comparison, 37 percent of those with DUI charges tested positive for alcohol.