Authorities say 33-year-old Deshana Melvin of Hope Mills is disabled and allegedly sold her own medications to undercover agents.
She is charged with three felony counts of opium/heroin trafficking and conspiring to traffick in opium/heroin.
Melvin is being held under a $32,000 bond.
Detectives also arrested a man who they say worked with Melvin to sell the drugs.
Phillip Cockrell, 50, of Fayetteville is charged with multiple felony counts of possession with intent to sell and deliver cocaine, opium/heroin trafficking, maintaining a dwelling for the sale and delivery of cocaine, conspiring to traffick opium/heroin and possession of drug paraphernalia.
He is being held under an $82,000 bond.
Authorities say Melvin gave Cockrell prescription drugs to sell. Those drugs included Oxycontin, Xanax and Percocet.
Authorities say they expect more arrests as the investigation continues.