Fentanyl seized in a drug raid is displayed at the Drug Enforcement Administration laboratory in Sterling, Va.

NEW YORK — The head of the Food and Drug Administration wants to more than double the number of packages his agency inspects for illicit drugs, an effort to stem a deadly flow of opioids that increasingly runs through the international mail supply.

FDA Commissioner Scott Gottlieb said Monday he needs more staffers to intercept opioids that are being disguised as other drugs and supplements.