Both face charges of child neglect. Tapper also faces a DUI charge, and Anderson drug possession charges.
The state Department of Children and Families is investigating the incident, a spokeswoman said.
The overdose problem is becoming a nationwide problem, and hearing about them has become a daily occurrence. And while not as common, authorities in the state and nation are reporting more adults found overdosed in cars with their children inside.
In January, a couple in Florida's Sarasota County were found unconscious in their car at a gas station with their two children in the backseat. And in September, police in Ohio released a photo that went viral of a similar call. The photo showed two adults in the driver and passenger seats with a young boy in the back seat with his face blurred out.
Also in Ohio, a girl had to call 911 from the backseat of an SUV last Saturday in Cincinnati after her parents overdosed on heroin.