A restaurant employee was poked with a used hypodermic needle left behind in a makeup bag that also contained heroin, Manheim Township police said.
The bag's owner has been charged with assault, drug possession and related crimes, police said.
The bag also contained 18 uncapped and two capped needles, 16 bags of heroin and a metal spoon, police said.
Caitlyn Amanda Hughes, 26, of Columbia, left it behind at Carrabba's, 100 North Pointe Boulevard, on Sunday, police said.
The employee was poked when she picked up the bag for safekeeping, police said.
Hughes is charged with recklessly endangering another person, simple assault, possession of heroin and possession of drug paraphernalia. All charges are misdemeanors.