CHICAGO (AP) — A federal study says an anti-addiction drug used to fight the nation’s heroin and painkiller abuse epidemics poses a threat to young children.

The risk is to kids who accidentally swallow relatives’ prescriptions, and some have even died.

The drug is called buprenorphine (boo-pruh-NOR’-feen). The study found it’s the adult prescription medication most commonly implicated in young kids’ emergency hospitalizations. It can cause life-threatening breathing problems in kids.

Most cases involved tablets from pill bottles. The authors say recent packaging changes including individually wrapped medicine may reduce the problem.

The study was published Monday in Pediatrics.