An investigation revealed Dickerson had filled a prescription in Miami on Feb. 3 for 450 oxycodone pills, leaving 238 tablets "unaccounted for over a six day period," Deputy Jason D. Leach reported.
The deputy reported that Miami is a "common place to get prescriptions to sell," and Dickerson told him she drove to Florida once a month.
Text messages found on Dickerson's cell phone were from would-be oxycodone buyers, according to Leach's report.
Dickerson admitted selling pain pills and said she was en route to make a sale, the deputy reported.
She was stopped on Edgemoor Road just after midnight after another deputy noticed a taillight out on the vehicle she was driving, according to the Leach's report.
Female jailers found the pain pill bottles during a search of Dickerson's body at the Anderson County Jail.
Dickerson is free on $20,000 bond.