A Pennsylvania mother is facing charges after her son was reported missing but was found home alone surrounded by bundles of heroin — what he called “Mommy’s medicine,” according to new reports.

Leslie Brown, 29, was busted on drug and child endangerment charges after cops in Pittsburgh responded to a Family Dollar store in the city’s Lincoln-Lemington-Belmar section, where she said she lost track of her son, the Pittsburgh Post-Gazette reports.

But surveillance footage from inside the store showed that Brown walked in by herself, leading cops to visit her home just outside the city in Penn Hills, the paper says, citing a criminal complaint filed Friday.

Cops allegedly found the underage boy — whose age was not provided by police — by himself at the home, where a couch was littered with bundles of heroin and empty bags to distribute the drug, the complaint states.

When asked about the drugs, the boy told an officer that it was “Mommy’s medicine,” police said.

“She makes it sometimes,” an officer wrote in the criminal complaint, per the Post-Gazette.

The bags and bundles of heroin allegedly found inside Brown’s home were labeled with names including “Panda,” “Play Boy” and “Power Trip,” while another bundle marked “Rx 360 out of stock” was also found in Brown’s car, police said.

Brown later admitted to cops that she manufactured the heroin herself on two occasions using over-the-counter products, but declined to say where she bought the narcotics to cut the drug, according to the criminal complaint.

“She had recently lost her job and was coping with some things which [led] to her use of heroin and subsequent manufacturing in order to pay bills for the house,” the officer wrote.

Employees told WPXI that Brown had frantically searched for her son inside the dollar store, prompting them to look in every aisle and even a back room.

Brown’s son is now staying with his grandparents, police told the station.

Brown, meanwhile, is facing charges of endangering the welfare of children, manufacture of narcotics, drug possession and recklessly endangering another person. She’s set to return to court on Sept. 5, the Post-Gazette reports.